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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
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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.