Art. XXXV.—Descriptions of New Species of New Zealand Mollusca.

By Henry Suter.

without any strong callosity. Anterior valve with 4 slits, the 2 central ones broader; intermediate valves with 1 slit on each side, and posterior valve with 7 inequidistant slits; all teeth of the first 7 valves finely pectinated and sharp, but those of the tail-valve are stout, deeply grooved, rather blunt-edged, all insertion plates are high. Sinus flat, finely denticulate; sutural laminæ angularly produced, rather thin; valve-callus not much raised.

Length, 22 mm.; breadth, 11 mm.; dry specimen. Divergence, 78°.

Animal with the gills extending nearly the whole length of the foot.

Type in my collection.

Hab.—Bay of Islands (J. C. Anderson).

Remarks.—This shell is distinguished by its peculiar cuneiform sculpture from all the species of the genus known to me; it adds another genus to the New Zealand fauna.

2. Seila cochleata, n. sp. Plate XXVIII, fig. 3.

Shell-small, conical, solid, dark-brown. Sculpture consisting of flat cinguli, 3 on the two whorls suceeding the embryonic shell, 4 on the following four whorls, and 5 on the body-whorl, to which are added 2 narrow spirals on the base, the upper of which arises from the suture; all are of about the same strength, the interstices of the same width as the cinguli, ornamented with fine axial striæ; the intercalation of an additional spiral takes place between the first and second rib, and it is at first very thin, but gradually attains the same strength as the others. Colour chestnut-brown. Spire elevated-conic, much higher than the aperture; outlines faintly conves. Protoconch broken off in the only specimen I have. Whorls about 10, regularly increasing, flat; base somewhat excavated. Suture deep, canaliculated by the spiral sculpture. Aperture triangularly oval, angled above, produced below into a very short and open canal. Outer lip rather thick, denticulated on the outside by the spirals, angularly rounded on meeting the straight basal lip. Columella vertical, short, arcuate, thick and rounded, subtruncate below; inner lip narrowly and thinly spread over the columella and parietal wall.

Diameter, 3.8 mm.; height, about 10.5 mm.

Type in my collection.

Hab.—Bay of Islands (J. C. Anderson).

Remarks.—In sculpture this species equals the Pliocene Bittium cinctum, Hutton (which, however, is a Seila), but the fossil species has more whorls, is higher, and the outlines of the spire are perfectly straight.

3. Aclis succincta, n. sp. Plate XXVIII, fig. 4.

Shell very small, turreted, perforate, hyaline and somewhat shining. Sculpture consisting of spiral threads, one upon the middle of the shoulder, the second (most prominent of all) on the angle of the shoulder, the third (slightly finer) a little below the periphery, and the fourth just above the suture; base with a few additional spiral liræ; the whole crossed by oblique rather distant axial lines reticulating the interstices and extending over the base; the axial sculpture by far not so conspicuous as the spiral. Colur light-horny. Spire turriculate, much higher than the aperture; outlines straight. Protoconch small, obtuse, spirally sharply ridged. Whorls 6. regularly increasing, distinctly shouldered, and angularly narrowed again below the periphery; base convex. Suture distinct, margined above by the fourth spiral. Aperture subvertical, oval. Peristome discontinuous, sharp. Columella vertical, somewhat arcuate, a little broadened and subtruncate below. Perforation narrow, open. Operculum unknown.

Diameter, 1.1 mm.; height, 2.6 mm.

Type in my collection.

Hab.—Near the Snares Islands, in 50 fathoms (Captain Bollons). One specimen.

4. Pyramidella (Eulimella) limbata, n. sp. Plate XXVIII, fig. 5.

Shell small, subulate, imperforate, polished, with channelled suture. Sculpture consisting simply of straight growth-lines, slightly plicate on some of the whorls. Colour white. Spiresubulate, much higher than the aperture; outlines straight. Protoconch heterostrophe, of 2 smooth whorls, the nucleus lateral. Whorls about 9, regularly increasing, flatly rounded; base convex. Suture very distinctly channelled. Aperture vertical, suboval, the sides subparallel, the base angularly effuse. Peristome solid, but not thickend, rather sharp; basal lip expanded. Columella straight, subtruncate below; inner lip not reflexed.

Diameter, 1.5 mm.; height, 5 mm.

Type in my collection.

Hab.—Bay of Islands, type; Takapuna Reef (H.S.).

5. Odostomia (s. str.) bembix, n. nov. Plate XXVIII, fig. 6.

Odostomia lactea, Angas, Hutton, Cat. Mar. Moll., 1873, p. 22, &c. (not of Angas nor of Dunker). O. angasi, Tryon, Index, p. 74 (not of Tryon).

Shell small, ovato-conic, subperforate, slightly polished, subdiaphanous, fairly solid. Sculpture consisting of irregularly

spaced nearly straight growth-lines, crossed by fine, some-times very indistinct, spiral striæ. Colour white, occasionally tinged with yellowish or pink. Spire conic, about 1 ½ times the height of the aperture; outlines straight. Protoconch very small, heterostrophe, of 1 smooth whorl. Whorls 8 in quite adult examples, but the shells usually obtained have 6 whorls; they increase regularly, are flatly convex, and the last whorl is usually distinctly angled at the periphery, but some-times rounded. Suture impressed, submargined below. Outer lip sharp, slightly convex; basal lip acutely convex and expanded. Columella oblique, with a prominent oblique plait above, concave below; inner lip broadly reflected below, spreading as a very thin callus over the parietal wall. Base with a distinct umbilical fissure.

Diameter, 3.5 mm.; height, 7.5 mm. Specimen of 8 whorls.

Diameter, 3 mm.; height, 5 mm. Specimen of 6 whorls.

Type in the Dominion Museum, Wellington.

Hab.—Stewart Island, type; Lyttelton Harbour, in 2 fathoms. (H. S.); Akaroa Harbour, in 6 fathoms (H. S.); Blind Bay; Narrow neck Reef, Devonport (H. S.); near Channel Island, Hauraki Gulf, in 25 fathoms.

Fossil in the Pliocene.

Remarks.—The Australian O. angasi, Tryon (= O. lactea, Angas), is a much more slender, subulate species, which has the body-whorl rounded, never angled.

6. Odostomia (s. str.) taumakiensis, n. sp. Plate XXVIII. fig. 7.

Shell very small, elongately ovate, imperforate, smooth and polished, thin, translucent. Sculpture consisting occasionally of a few microscopic indistinct spiral striæ on the body-whorl, but very often absent; growth-lines fine, oblique. Colour white. Spire elevated-conic, about 1 ½ times the height of the aperture; outlines somewhat convex. Protoconch minute, heterostrophe, but slightly tilted, of 1 smooth whorl, globular. Whorls 5, regularly increasing, lightly convex; base flatly rounded. Suture impressed, margined below by a rather broad band. Aperture subvertical, oval, angled above, rounded and effuse below. Outer lip thin and sharp. Columella slightly oblique, arcuate, with a deeply situated and not very prominent plait above; inner lip but slightly expanded, forming a very thin and shining layer on the parietal wall.

Diameter, 1.5 mm.; height, 3.2 mm.

Type in my collection.

Hab.—Near Taumaki Island, west coast of the South Island, in 10 fathoms, type; near the Snares and Bounty Islands, in 50 fathoms (Captain Bollons).

Remarks.—From O. proxima this species is distinguished by being imperforate, having very faint or no spiral sculpture, the suture margined, and only 5 whorls; form O. marginata by the same characters, except the margined suture, and the body-whorl not being angled.

7. Odostomia (s. str.) inornata, n. sp. Plate XXVIII, fig. 8.

Shell small, subulate, imperforatc, fairly solid, lightly polished, smooth. Sculpture consisting of straight and fine growth-lines only. Colour white. Spire broadly subulate, twice the height of the aperture; outlines straight. Protoconch heterostrophe, oblique, globular, of 1 whorl, smooth. Whorls 6, regularly increasing, the last rather high, but slightly convex, body-whorl sometimes faintly angled at the periphery; base flat. Suture impressed, narrowly and rather indistinctly margined below. Aperture subvertical, narrowly pyriform, rounded and produced below. Outer lip slightly convex, sharp. Columella somewhat oblique, arcuate, with a distinct oblique and deeply placed plait above; inner lip narrow above, but broadening toward the base, spread as a thin callus over the parietal wall. Sometimes there is a narrow umbilical chink present.

Diameter, 2.5 mm.; height, 6.1 mm.

Type in my collection.

Hab.—Near the Snares (type) and Bounty Islands, in 50 fathoms (Captain Bollons).

Remarks.—This species is apparently nearly allied to O. hyphala, Wats., but the whorls are not slightly scalar, the suture is less deep, the columellar plait stronger, &c.

8. Odostomia (s. str.) denselirata, n. sp. Plate XXVIII, fig. 9.

Shell minute, elongately oval, thin, semitransparent, slightly shining, imperforate. Sculpture: The protoconch and the succeeding whorl smooth, the others microscopically, densely, and distinctly spirally striate; growth-lines fine, vertical, and somewhat flexuous. Colour white. Spire conical, very little higher than the aperture; outlines moderately convex. Protoconch heterostrophe, of 2 whorls, smooth, polished, convex, nucleus lateral. Whorls 5, regularly increasing, flatly convex; base flat. Suture impressed. Aperture subvertical, ovate, high, angled above, narrowed and produced below. Outer lip regularly convex, thin and sharp. Columella vertical, arcuate, with a small plait above; inner lip extending very little beyond the pillar, but broadening towards the base.

Diameter, 1.25 mm.; height, 2.5 mm.

Type in my collection.

Hab.—Near Little Barrier Island, in 20 fathoms; type (R. H. Shakespear).

9. Odostomia (s. str.) takapunaensis, n. sp. Plate XXVIII, fig. 10.

Shell small, conical, narrowly umbilicate, smooth, fairly solid, shining. There is no sculpture. Colour white. Spire conic, about twice the height of the aperture; outlines straight. Protoconch heterostrophe, of 2 oblique whorls, nucleus lateral. Whorls 7, regularly increasing, flatly convex, the last regularly rounded at the periphery; base flat. Suture impressed. Aperture subvertical, oval, broadly angled above, effuse below. Outer lip slightly arcuate, sharp. Columella subvertical, arcuate, with a distinct oblique plait above; inner lip narrow, broadening a little below; thin over the parietal wall. Umbilicus narrow, but very distinct and quite open.

Diameter, 2.2 mm.; height, 4 mm.

Type in my collection.

Hab.—Takapuna Reef, in sand; type (H. S.).

10. Odostomia (s. str.) dolichostoma, n. sp. Plate XXIX, fig. 11.

Shell small, ovate, imperforate, faintly shining, opaque. Sculpture consisting of a few indistinct and distant spiral striæ on the body-whorl; growth-lines rather strong, oblique. Colour yellowish-white. Epidermis horny, very thin, easily wearing off. Spire conic, somewhat scalar, about the same height as the aperture; outlines almost straight. Protoconch of 1 smooth and polished whorl, heterostrophe, oblique. Whorls 4, the last very high, flatly convex, projecting out of the suture; base faintly rounded. Suture deep. Aperture vertical, pyriform, high, sharply angled above, broadly rounded and effuse below. Outer lip regularly arched, a little thickened inside, sharp. Columella subvertical, arcuate, with a feeble plait above, placed rather deep within; inner lip spreading a little beyond the pillar, having a sharp outer edge, broadening towards the base and extending as a very thin glaze over the parietal wall. Operculum horny, inner margin very little indented.

Diameter, 2.1 mm.; height, 4.2 mm.

Type in my collection.

Hab.—Cheltenham Beach, near Auckland (H. S.).

11. Odostomia (s. str.) cryptodon, n. sp. Plate XXIX, fig. 12.

Shell very small, ovate, fairly solid, imperforate, smooth, slightly shining. There is no sculpture, except fine oblique

growth-lines. Colour white, slightly yellowish. Spire conic, a little higher than the aperture; outlines but faintly convex. Protoconch heterostrophe, oblique, of 1 smooth and convex whorl. Whorls 4, regularly increasing, flatly rounded; base moderately convex. Suture impressed. Aperture a little oblique, oval, angled above, narrowly effuse below. Outer lip thin and sharp. Columella vertical, arcuate, with a small plait above, which is deep within the aperture; inner lip extending a little beyond the columella, with a sharp edge, slightly broadening below; not spreading over the parietal wall. Operculum normal.

Diameter, 1.6 mm.; height, 3 mm.

Type in my collection.

Hab.—Te Onepoto Bay, near Lyttelton, type (T. Iredale); Queen Charlotte Sound, in 16 fathoms (Captain Bollons).

12. Odostomia (s. str.) acutangula, n. sp. Plate XXIX, fig. 13.

Shell minute, elevated-conic, rimate, solid, polished. Sculpture consisting of a few microscopic spiral striæ, crossed by vertical flexuous fine growth-lines. Colour white. Spire elevated-conic, about twice the height of the aperture; outlines straight. Protoconch heterostrophe, oblique, small, and rounded, of 1 whorl. Whorls 5, regularly increasing, flatly convex, the last acutely angled at the periphery; base flat. Suture impressed between the upper whorls, channelled further down. Aperture subvertical, broadly oval, angled above and effuse below. Outer lip nearly straight, acutely rounded on meeting the basal lip, which is straight. Columella vertical, very little arcuate, with a feeble and deep-seated plait above; inner lip narrow. Umbilical chink very small.

Diameter, 1.4 mm.; height, 2.7 mm.

Type in my collection.

Hab.—Port Pegasus, Stewart Island, in 18 fathoms (Captain Bollons).

Remarks.—The only shell at my disposal is hardly adult.

13. Odostomia (s. str.) pudica, n. sp. Plate XXIX, fig. 14.

Shell small, elongate, imperforate, smooth, semitransparent, polished. There is no sculpture, except fine straight growthlines. Colour white. Spire subulate, twice the height of the aperture; outlines straight. Protoconch of 1 small and smooth whorl, heterostrophe, oblique. Whorls 7, regularly increasing, flat, the lower ones angularly contracted above the suture, the angle continued on the periphery of the body-whorl; base flat. Suture canaliculate. Aperture oblique, pyriform,

angled above and narrowly produced below. Outer lip flatly rounded, thin and sharp. Columella vertical, slightly concave, with a low oblique plait above; inner lip rather broadly expanded, spreading thinly over the parietal wall.

Diameter, 2.4 mm.; height, 5.6 mm.

Type in my collection.

Hab.—Bay of Islands (J. C. Anderson).

Remarks.—This species is evidently also near O. hyphala, Wats., but it is shorter, with the same number of whorls, and slightly more slender; the whorls are angled above the suture, the last whorl is slightly angled at the periphery; the suture is channelled and the whorls not projecting below it.

14. Odostomia (Menestho) sabulosa, n. sp. Plate XXIX, fig. 15.

Shell small, elevated, spirally striate, thin, faintly shining, imperforate. Sculpture consisting of flattish spiral cords, 7 on the penultimate whorl, and extending over the base; interstices slightly narrower than the cords, ornamented with numerous equidistant axial threads. Colour white. Spire narrowly conic, twice the height of the aperture; outlines straight. Protoconch heterostrophe, of 1 whorl, smooth, globular. Whorls 6, regularly increasing, but faintly convex; base flattish. Suture canaliculate, but not very deep. Aperture subvertical, oval, angled above, narrowly rounded and effuse below. Outer lip slightly convex. Columella vertical, almost straight, the columella plait small and deep within the aperture; inner lip narrow, not reflexed, forming a very thin glaze on the parietal wall.

Diameter, 1.8 mm.; height, 4.2 mm.

Type in my collection.

Hab.—Near the Bounty (type) and the Snares Islands, in 50 fathoms (Captain Bollons).

Remarks.—The axial sculpture is in the majority of the dredged and more or less worn specimens almost completely lost. The species is more slender than O. impolita, Hutt., the spiral cords more distinct and mostly with wider interspaces, and the latter are in well-preserved specimens reticulated by axial threads.

15. Odostomia (Evalea) liricincta, n. sp. Plate XXIX, fig. 16.

Shell very small, elongate-oval, imperforate, spirally lirate, slightly shining. Sculpture consisting of unequal flat spiral liræ, absent on the first 2 whorls, the interstices linear, the sculpture extending over the base; growth-lines dense, oblique, distinct. Colur white. Spire elevated-conic, about twice the

height of the aperture; outlines straight. Protoconch minute, heterostrophe, globular. Whorls 5, regularly increasing, flatly convex, the last not angled; base flattish. Suture impressed. Aperture slightly oblique, angled above and narrowly produced below. Outer lip regularly rounded, thin and sharp. Columella subvertical, almost straight, with a minute plait above; inner lip extending a short distance beyond the pillar, and as a thin layer over the parietal wall.

Diameter, 1.5 mm.; height, 3.3 mm.

Type in my collection.

Hab.—Port Pegasus, Stewart Island, in 18 fathoms (Captain Bollons).

Remarks.—This species is nearest allied to O. impolita, Hutt., but it is smaller, more slender, and the spiral sculpture is much more distinct. The fossil O. fasciata, Hutt., is also very similar, but has a differently arranged sculpture and an open umbilicus. Hutton's name, dating of 1885, being preoccupied by Dunker, 1860, I propose the name O. huttoni for it.

16. Eulima truncata, n. sp. Plate XXIX, fig. 17.

Shell very small, subcylindrical, thin and polished, semitransparent, straight. There is no sculpture and no varices. Colour white. Spire very narrowly conic, a little more than twice the height of the aperture; outlines straight. Protoconch high, obtusely rounded. Whorls 5, regularly increasing, flat; base flattish, elongated. Suture linear, superficial, falsemargined below. Aperture subvertical, lanceolar, high and narrow, sharply angled above and acuminate below. Outer lip straight above, rounded towards the base, thin and sharp. Columella short, truncated at the base; parietal wall slightly concave.

Diameter, 1 mm.; height, 3 mm.

Type in my collection.

Hab.—Cape Maria van Diemen (Captain Bollons).

Remarks.—No doubt the specimen is not full grown.

17. Eulima titahica, n. sp. Plate XXIX, fig. 18.

Shell small, subulate, slightly curved, semitransparent, polished, with a few discontinuous and inconspicuous varices. Sculpture consisting of a few indistinct varices and faint growthlines. Colour white. Spire somewhat curved to the right, narrowly conic, three times the height of the aperture. Protoconch globular, obtuse. Whorls 7, regularly increasing, flatly convex; base rounded. Suture linear, not much impressed, false-margined below. Aperture pyriform, angled above, slightly effuse below. Outer lip but slightly curved, thin and

sharp; basal lip broadly convex. Columella vertical, indistinctly arcuate; parietal wall straight; inner lip very little expanded, with a sharp edge.

Diameter, 1.4 mm.; height, 4 mm.

Type in my collection.

Hab.—Titahi Bay, Cook Strait (Miss M. Mestayer).

18. Latirus huttoni, n. nov. Plate XXX, fig. 3.

Trophon dubius, Hutton, Journ. de Conch., vol. xxvi, 1878, p. 13. Taron dubius, Hutton, Trans. N.Z. Inst., vol. xvi, p. 227.

The late Captain F. W. Hutton proposed the genus Taron for his Trophon dubius in 1883 (Trans. N. Z. Inst., vol. xv, p. 119), because the dentition proved the mollusc to belong to the Fusidæ, and, in his opinion, the operculum has not an apical, but subcentral, nucleus. This latter is not correct, as the growthlines on the outer side of the operculum distinctly show the nucleus to be apical. Looking at the operculum held up against the light, however, one gets the impression that the nucleus is subcentral, and this has no doubt misled Captain Hutton. The dentition is that of Latirus, as already pointed out by J. C. Melvill in 1891 (Mem. and Proc. Manchester Lit. and Philos. Soc. (4), vol. iv, p. 12), and the shell has all the characters of that genus. Taron, therefore, must be reduced to a synonym of Latirus. The specific name of Hutton being preoccupied in the genus for a fossil shell by Beyrich, I propose the name as above.

19. Euthria strebeli, n. nov. Plate XXX, fig. 4.

E. antarctica, Reeve, Hutton, Man. N.Z. Moll., 52; Index, 73. Pisania antarctica, Reeve, Hutton, Trans. N.Z. Inst., vol. xvi, p. 231 (not of Reeve).

Shell not large, fusiform, very solid, usually sprially ridged. Sculpture consisting of numerous narrow spiral ridges, much more prominent upon the base, the interstices with fine spiral threads; tow or tree whorls below the protoconch are axially costate; growth-lines oblique, fine. Colour whitish or cinereous, very often with light-brown spiral bands; aperture purplishbrown within, outer lip white or with a few brown patches. Sometimes the whole shell is covered by a blackish coating. Spire elevated-conic, height almost that of the aperture with canal; outlines but little convex. Protoconch minute, of 2 smooth and convex whorls. Whorls 8, first slowly increasing, the last high; they are very lightly convex, depressed below the suture, the base contracted. Suture not much impressed. Aperture very little oblique, narrowly oval, distinctly channelled

above, produced below into a moderately long recurved and open canal, notched at the base. Outer lip flatly convex, sharp, much thickened inside, and distinctly toothed. Columella vertical, arcuate, with a number of tubercles at the base; inner lip rather narrow upon the pillar, extending over the parietal wall, which has a well-marked plait below the suture; the lip is narrowed below, forming the inner edge of the canal. Fasciole prominent, lamellate; a narrow groove between it and the edge of the canal. Operculum horny, yellowish, the nucleus apical.

Diameter, 15 mm.; height, 28 mm. Angle of spire, 47° to 50°.

Type in my collection.

Hab.—Dunedin Harbour, type (H. S.); Lyttelton Harbour (H. S.); Preservation Inlet; Auckland Islands.

Remarks.—This species is much more solid than E. littorinoides, Reeve; the spiral bands are inconspicuous, and the outer lip is not banded with brown within. When studying the exhaustive descriptions and very good figures of E. Fuscata, Brug. (=Bucc. antarcticum, Reeve), published by Dr. H. Strebel (Zool. Jahrb., Abt. Systematik, vol. xxii, 1905, p. 611) I was more than doubtful about the identity of the New Zealand species, and I asked for Dr. Strebel's opinion on the subject. He most courteously informed me that our species was not E. antarctica, Reeva, at all, and that it seemed to him more nearly allied to E. dira, Reeve, from the west coast of North America. Our shell, however, in my opinion, is also quite distinct from this as well, but nearly allied to E. vittata, littorinoides, and striata. The four species so closely resemble one another that it is not always easy to separate them, their variability being so great. I have much pleasure in uniting the name of the distinguished conchologist, Dr. Hermann Strebel, with the species.

20. Tritonidea (Cantharus) fuscozonatus, n. sp. Plate XXX. fig. 5.

Shell ovato-fusiform, solid, spirally ridged and axially broadly costate. Sculpture consisting of regular spiral liræ of subequal strength, the interstices with 1 or several fine spiral threads, the liræ more prominent and further apart on the base; axial ornamentation formed by rather distant, elevated, and broadly rounded axial costæ, about 15 on a whorl, the spirls passing over them; they are getting obsolete on the base. Colur fulvous, the spiral riblets purple, sometimes a purple band above the suture and a second below the periphery of the body-whorl are present, also longitudinal streaks of light-brown; aperture whitish within. Spire conical, turreted, of the same height as the aperture with canal; outlines straight. Protoconch conical,

axially striate. Whorls 6 to 7, the last high, concave on the shoulder, convex below it; base contracted. Suture not deep, undulating. Aperture somewhat oblique, narrowly channelled above, with an oblique narrowly open and slightly recurved canal below, its base notched. Outer lip thick, with a distinct varix outside, callous and denticulate within. Columella vertical, concave, with transverse ridges over the whole length; inner lip narrow, spreading over the concave parietal wall, which bears a tubercle above; narrowed below to a point. Some specimens have a distinct depression between the fasciole and the edge of the canal. Operculum unknown.

Diameter, 14 mm.; height, 26 mm. Type specimen.

Type in the Dominion Museum, Wellington.

Hab.—East Cape Lighthouse, type; Foveaux Strait.

Remarks.—This species is very variable in size; my largest specimen, of 7 whorls, measures 17 mm. by 32 mm., the smallest also of 7 whorls, 10.5 mm. by 21 mm., but numerous intermediate forms occur.

21. Tritonidea (s. str.) colensoi, n. sp. Plate XXX, fig. 6.

Shell small, ovate, solid, distinctly broadly spirally lirate, and more or less distinctly axially costate on the spire-whorls. Sculpture consisting of broad and flattish spiral liræ, 3 on the penultimate, 9 to 10 on the body whorl, the interstices narrow, linear; they are crossed on the spire-whorls by flatly rounded axial ribs, about 12 on a whorl, which usually cut up the spirals into squarish nodules. Colour white, the spiral grooves purplish-brown, a few longitudinal narrow light-brown bands passing over the body-whorl and across the interstices of the axial ribs; aperture purple within, outer lip and columella white. Spire short, conic, about the same height as the aperture; outlines faintly convex. Protoconch very small, convex, of 1 ½ smooth whorls. Whorls 5, the last high, flattish; base lightly contracted. Suture not deep, uneven. Aperture somewhat oblique, narrowly channelled above, produced below into a short oblique and narrowly open canal, its base notched. Outer lip very thick, with a blunt edge and a broad varix on the outside; inside callous, denticulate-lirate. Columella vertical, lightly concave, with several ridges at its base; inner lip narrow, not distinctly bounded, extending over the concave parietal wall, which has one or two tubercular plaits above; at the base the lip is narrowed towards the canal. Operculum unknown.

Diameter, 10 mm.; height, 18 mm.

Type in the Dominion Museum, Wellington.

Hab.—East Cape Lighthouse.

Explanation of Plates XXVIII-XXX.
Plate XXVIII.

Fig. 1–2. Tonicia cuneata, Suter. 22 mm. by 11 mm.

Fig. 3. Seila cochleata, Suter. 3.8 mm. by 10.5 mm.

Fig. 4. Aclis succincta, Suter. 1.1 mm. by 2.6 mm.

Fig. 5. Pyramidella (Eulimella) limbata, Suter. 1.5 mm. by 5 mm.

Fig. 6. Odostomia bembix, Suter. 3 mm. by 5 mm.

Fig. 7. " taumakiensis, Suter. 1.5 mm. by 3.2 mm.

Fig. 8. " inornata, Suter. 2.5 mm. by 6.1 mm.

Fig. 9. " denselirata, Suter. 1.25 mm. by 2.5 mm.

Fig. 10. " takapunaensis, Suter. 2.2 mm. by 4 mm.