OF NEW SOUTH WALES. 259 



aperture ovate, peristome thin above, thickened in the middle, 

 expanded and reflected below. 



Length, 3 lines, breadth f line. 



Hub. Darnley Island, Torres Straits, 20 fathoms, sandy mud. 



50. — Odosto.mia, sp. I 



Hab. Darnley Island, Torres Straits, 20 fathoms, sand. Two 

 specimens found sea-worn and broken in the aperture. 



51. — Ol>OSTO.MIA, sp. 1 



Hub. Darnley Island, Torres Straits, 20 fathoms, sand. One 

 specimen found dead and sea-worn. 



52. — Odostomu, sp. \ 



Hab. Darnley Island, Torres Straits, 20 fathoms sand. One 

 specimen found dead and worn. 



53. — ODOSTOMIA CLARA, N. SP. 



Shell ovately conical, thickened, transparent, shining, white, 

 whorls 7, slightly convex, suture deep, last whorl somewhat angled, 

 aperture ovate, produced anteriorly, columella plait, transverse 

 and small, peristome thin, simple, interior of aperture studded with 

 8 narrow distinct raised lines running spirally inwards. 



Length, 3 lines, breadth 1^ line. 



Hab. Darnley Island, Torres Straits, 20, 30 fathoms, rough 

 sand. 



54. — Odostomia affinjs, n. sp. 1 

 Shell acuminately ovate, solid, smooth, white, whorls 7, fiat, 

 angulate at the sutures, faint keel above, spire lengthened, aper- 

 ture oblong ovate, slightly produced anteriorly, columella with 

 small narrow acute spiral plait ; peristome thin, acute, interior of 

 aperture furnished with 10 faint raised lines of striae. 

 Length 2-| lines, breadth 1 line. 



Hab. Cape York, North Australia, 11 fathoms, sandy mud 

 bottom ; Darnley Island, Torres Straits, 20, 30 fathoms, rough 

 sand. 



