Zeradina odhneri n. sp. (Fig. 1).

Shell small, thin, elongate-ovate, dull white. Protoconch dome-shaped, rather large of 1 ½ smooth glassy whorls. Whorls 4 ½, sepa-rated by a deep suture. Spire a little higher than aperture, with con-vex outline. Sculpture consisting of exceedingly fine and numerous regular spiral striae, indistinctly reticulated by fine and close thread-like axial growth-lines. Aperture narrowly ovate, angled above and broadly rounded below. Peristome thin, continuous, separated from parietal wall. Outer lip flexuous, retractive below suture for a short distance, forming a broad shallow sinus, then protractive below centre of whorl.

Height 4.5 mm.; diameter 1.4 mm. (holotype)

Height 4.0 mm.; diameter 1.0 mm. (paratype)

Holotype and 4 paratypes in Author's collection, Auckland.

Remarks: Closely related to Odhner's Fossarus ovatus (13, p. 18) but differs from that species in being much larger and yet propor-tionately narrower with a slightly taller spire. Odhner's F. produc-tus (13, p. 19) is also a related species.

Turritella, (Zeacolpus) ahiparana n. sp. (Fig. 4).

Shell moderately large, elevated, many-whorled, spire with a single strong, smooth, spiral keel. Protoconch of two smooth rounded whorls. Whorls 14. First post-nuclear whorl starting with a sharp angle at middle, rapidly developing into a strong spiral keel, which increases in size and becomes lower down in succeeding whorls. With exception of a second keel on base, proceeding from suture the only remaining sculpture consists of very fine and uniform spiral striae, which covers the whole of post-nuclear whorls and base, with excep-tion of keels, which are smooth and rounded. Aperture subquadrate. Outer lip thin and sharp with broad shallow rounded sinus. Colum-ella vertical, thin. Parietal wall with thin spreading glaze. Colour, dull reddish-brown; protoconch, first post-nucear whorls, spire, and basal keels lighter; base slightly darker. No colour-pattern or mottl-ing. Height, 23.25 mm.; diameter, 7 mm. (Holotype).

Holotype and many paratypes in author's collection, Auckland.

Remarks: Turritella pagoda Reeve, is the closest related species, which, however, differs in having a second spiral about half the strength of the main keel, at upper third of whorls. The main keel is not nearly so prominent as in ahiparana. The colour pattern of pagoda (reddish-brown streaks on a pale ground), is entirely want-ing in ahiparana, which is uniformly dull reddish-brown.

Although ahiparana was extremely common in this dredging it is apparently quite local in distribution as I have not found it in any other northern dredging.

Syrnola crawfordi n. sp. (Fig. 2.)

Shell small, elongated, smooth and polished. Whorls 8 plus a heterostrophe, sinistral, convoluted protoconch of 2 ½ whorls, with a horizontal axis. Colour white. Surface of shell appearing smooth and polished but showing under microscope extremely fine spiral

striae. Spire high 3 ¼ times height of aperture, outlines straight, body-whorl rounded at periphery. Suture deeply impressed. Aper-ture elongate-ovate, angled above and narrowly rounded below. Outer lip thin and sharp. Columella vertical, slightly arcuate with small plait above. Base rounded with slight umbilical chink behind columellar fold.

Height, 5.25 mm.; diameter, 1.45 mm.

Holotype in writer's collection and one paratype in collection of Mr. W. La Roche, Auckland.

Remarks: Closely related to S. lurida (Suter) from off Cuvier Id. in 38 fathoms. From crawfordi nov, lurida differs in having whorls faintly convex in outline and more rapidly increasing, protoconch of but one globose whorl and protoconch plus 7 adult whorls in a length of 6 mm., whereas crawfordi has 8 adult whorls plus proto-conch in 5.25 mm. Named in honour of Mr. D. Crawford who secured the material on which this paper is based.

Coluzea spiralis (A. Adams).

As a synonym of this species E. A. Smith's Columbarium suteri (15 p. 87) should be added.

A fine series of C. spiralis were represented in the Ahipara dredg-ing, ranging from juveniles of 3 whorls up to perfect fresh adults. Unfortunately the soft parts were not preserved by the collector. A specimen of 6 whorls agrees in every particular with Smith's descrip-tion of his Columbarium suteri, founded on a single example of 6 whorls, and also with the specimen ascribed to this species by Miss Mestayer from 98 fathoms of Big King Id. Three Kings Id. (10 p. 126). The exact generic place must remain in doubt until the radula of spiralis is known as the shells of Columbarium and Coluzea (Fusi-nus) are remarkably similar.

Lieut.-Colonel A. J. Peile has published (Pro. Mal. Soc. XV., 1922 pp. 18, 19, fig. 1) a new figure of the radula of Columbarium. He withdraws the genus from the Turridae and refers it to the Rachi-glossa near Muricidae.

The figure (fig. 3) represents the protoconch and first post-nuclear whorls of an Ahipara specimen.

Aeneator attenuata n. sp. (Fig. 5).

Shell moderately large, solid, elongate, fusiform, whorls lightly convex, spire and canal produced. Protoconch rather small of 2 ½ smooth rounded whorls. Whorls 8 rapidly increasing. Spire tall, almost equal to height of aperture plus canal. Outline of whorls lightly convex but with a shallow depression just below upper suture, body-whorl inflated at middle. Suture deep, appressed. Post-nuclear sculpture, continuing over base and canal, consisting of numerous fine spiral cords (14 on penultimate whorl) with single fine spiral thread in each intercostal space. First 2 ½ post-nuclear whorls with strong, close, rounded axial costae, absent on succeeding whorls, the only axial sculpture being fine flexuous growth-lines.

Aperture ovate, produced below into rather long open canal, curved slightly towards left. Peristome discontinuous. Outer lip strong, flexuous, lirate within, with a broad shallow sinus extending from just below suture to periphery. Inner lip with a linear denticle marking off anterior canal. Columella concave, covered with rather thick callus separated from body-whorl by a groove running right to extremity of canal. Outer lip of canal broken away in holotype, the only known specimen.

Holotype in author's collection, Auckland.

Height, 53 mm.; diameter, 20.5 mm.

Remarks: This species is quite distinct from the Castlecliff A. marshalli Murdoch (12 p. 159), which also occurs recent. A. attenuata differs from marshalli in having a proportionately much taller spire with whorls not so inflated but more finely sculptured with more numerous spiral cords, also with axial sculpture nearly obsolete, con-fined to the first two or three post-nuclear whorls only.

Ancilla (Baryspira) novae-zelandiae Sowerby.

The average height of this species is 8 or 9 mm. Occasional specimens from deep water in northern parts of New Zealand attain almost double this height. A series of 26 specimens were obtained in the Ahipara dredging, of which number only six were 9 mm. or less in height. The two largest were 16.5 mm. (height) × 7.5 mm. (breadth) and 16.75 mm. × 8 mm. respectively.

Excepting the much larger adult size there are no differences on shell characters between these large forms and the smaller typical species. Ancilla australis is subject to similar discrepancies in adult size according to habitat, and also Ancilla mucronata, the average height of which is about 30–40 mm. I have a specimen of this latter species from Mount Maunganui, Bay of Plenty, measuring 60 mm. in height.

The spire-callus is also extremely variable in the genus. Several of the large A. novae-zelandiae from the Ahipara dredging have great swollen spires exceeding in width the maximum diameter of their respective body whorls.

Rugobela (3, p. 514) ahiparana n. sp. (Figs. 6 and 7).

This shell is temporarily ascribed to Rugobela for lack of a better location. A single imperfect specimen was obtained, complete enough to furnish a recognisable description of the species, but hardly suffi-cient for founding a new genus.

Shell small, narrowly fusiform, thin. Protoconch of 2 ½ smooth, white, globose whorls. Whorls 5 ½, lightly convex, rapidly increasing. First post-nuclear whorl with indistinct spiral sculpture and faint axial growth lines, following whorl with six distinct spiral riblets, the lower three closer together than upper three; penultimate whorl with about 20 riblets; body whorl with sculpture only faintly indi-cated, except eight stronger spirals on base, with channelled inter-stices, and the first few from the upper suture, similarly channelled but not quite so deeply. Basal sculpture stopped by fasciole. All