104 PETTERD : ON TASMANIAN MARINE SHELLS. 



4. Fossarina Legrandi, n. sp. 



Shell small, depressly globose, thin, highly polished, 

 translucent, rich brown; spire minute, very little elevated; 

 whorls 3 1", suture much impressed; aperture inflately lunate, 

 tinged white and faintly dilate at the inner portion, 



Diam. 2, long. 2 mil. 



Habitat — Circular Head and Kings Island, Bass Straits. 



A minute polished shell; in shape somewhat resembling 

 F. Pettei-di, Crosse, but the coloration and extreme polish is 

 . totally different from that shell. It is rarely met with, and 

 then only dead specimens. 



5. Columbella alba, n. sp. 



Shell attenuately fusiform, shining, white faintly tinged 

 with chesnut, regularly transversely striate all over; whorls 6, 

 flatly convex; aperture narrowly ovate, inner portion faintly 

 thickened, outer lip thin. 



Long. 7, lat. 3 mil. 



Habitat — Blackman's Bay. 



A very distinct species from any form heretofore recorded 

 from this island; the regular transverse striae is a character by 

 which it can be easily recognised. 



6. Schismope iasmanica, n. sp. 



Shell minute, obliquely globose, perforated, thin, white, 

 somewhat shining; spire scarcely raised, minute; whorls 3|-, 

 last much inflated, perforation deep, margined with a promi- 

 nent ridge which is faintly serrated; obscurely irregularly 

 striate all over; sinus deeply open, fascia of which forms a 

 deep groove encircling body whorl; aperture rounded, inner 

 lip faintly dilate, labrum thin, acute. 



Long. 2, lat. 2' mil. 



Habitat — Blackman's Bay. 



The second species discovered here; it may be easily 

 known from the first, S. Afkinsoin, T. Woods, by the smooth 



J.C., il., April, 1S7:) 



