366 Transactions. 



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 Up 

 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. Sculp- 

 ture consisting of a few microscopic spiral stria?, crossed by 

 vertical flexuous fine growth-lines. Colour white. Spire ele- 

 vated-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 im- 

 pressed 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 growth- 

 lines. Colour white. Spire subulate, twice the height of the 

 aperture ; outlines straight. Protoconch of 1 small and 

 Mnooth whorl, heterostrophe, oblique. Whorls 7. regularly in- 

 c'reasihg, flat, the lower ones angularly contracted above the 

 suture, the angle continued on the periphery of the body-whorl ; 

 hase flat. Suture canaliculate. Aperture oblique, pyriform, 



