338 GASTROPODA. [Pectinibranchia. 



incremental lines. Colour white. Spire high, slowly tapering towards 

 the small globular apex, more than three times the height of the aper- 

 ture ; outlines somewhat convex. Protoconch heterostrophe, sub- 

 central, smooth, the apex tilted up and globular, 1 whorl. Whorls 7, 

 first slowly increasing, the last about half the length of the whole 

 shell ; base narrowly rounded. Suture distinct, but superficial. Aper- 

 ture vertical, ovate, truncated above by the parietal wall. Outer lip 

 very little curved, broken off. Basal lip narrowly convex. Columella 

 with a distinct blunt plait above, slightly concave below. Operculum 

 unknown. 



Diameter, 1-5 rnm. ; height, 4-5 mm. 



Animal unknown. 



Type in the Dominion Museum. 



Hob. 'Near Channel Island, Hauraki Gulf, in 25 fathoms (type). 



8. Odostomia incidata, Suter, 1908. Plate 16, fig. 21. 



Odostomia incidata, Suter, T.N.Z.I., xl, 1907 (1908), 348, pi. 27, f. 6. 



Shell small, subulate, narrowly subperforate, with a fine groove 

 on the periphery of the body-whorl, fairly solid, polished. Sculpture 

 consisting of excessively fine dense microscopic spiral lines ; on the 

 third whorl a very fine groove appears above and close to the suture, 

 a little more distant and better marked on the next volution, and 

 continued on the periphery of the last whorl ; growth-lines vertical, 

 fine, but distinct. Colour white. Spire elevated conical, about 2| 

 times the height of the aperture ; outlines almost straight. Proto- 

 conch small, heterostrophe, tilted at a right angle to the axis, of 1 

 whorl, smooth and shining. Whorls 6, regularly increasing, slightly 

 shouldered and convex ; base rounded. Suture channelled, lightly 

 margined below. Aperture oblique, oval, angled above and effuse 

 below. Outer lip moderately convex, thin, and sharp. Columella 

 short, strongly arcuate, with a very strong plait above. Inner lip 

 very narrow. Umbilical chink a mere fissure. Operculum unknown. 



Diameter, 1-8 mm. ; height, 4-5 mm. 



Animal unknown. 



Type in my collection. 



Hab. Five miles south of Cuvier Island, in 38 fathoms, type 

 (Captain Bollons) ; dredged off Otago Heads (A. Hamilton). 



9. Odostomia inornata, Suter, 1908. Plate 16, fig. 22. 



Odostomia inornata, Suter, T.N.Z.I., xl, 1907 (1908), 364, pi. 28, f. 8. 



Shell small, subulate, imperforate, fairly solid, lightly polished, 

 smooth. Sculpture consisting of straight and fine growth-lines only. 

 Colour white. Spire broadly subulate, twice the height of the aper- 

 ture ; outlines straight. Protoconch heterostrophe, oblique, globular, 



