IQI0. | H. B. Preston: Descriptions of new shells. 35 
coarsely denticulate just within; aperture elongately inversely 
auriform. 
Altitude af Sea 4, HAT 
Diam., major Sse OLE 
Aperture, alt. rate, Ati 
bs diam. phe ee, 
Hab.—Balasore Bay, Orissa Coast. (Bengal Fisheries.) 
Type in Indian Museum (Reg. No. M. *4"*). 
A remarkable species which is easily recognizable both by its 
closely set, flat ribbing and by the extraordinary varex on the 
last whorl: it has all the appearance of a comparatively deep-sea 
form. 
Avicula smitht, sp. nov. 
Shell thin, subquadrate ; right valve flattish, somewhat scab- 
rous; left valve convex, smooth, polished, both valves greyish 
white, tesselated with golden brown, stained in places with 
bright yellow and blotched with deep blackish purple; winged 
Fic. 4.—Avicula smitht, sp. nov. 
both anteriorly and posteriorly, the anterior wing being broader 
and longer than that on the posterior side ; dorsal margin straight ; 
ventral margin rounded; anterior side obliquely curved; posterior 
side concavely sloping, rostrate below; interior of shell nacreous, 
iridescent. 
Long. ae =) 85300 sain: 
Lat. (across wings) Beem WG 7 
Hab.—Off Gopalpur, Ganjam Coast, 24 fathoms. (Bengal 
Fisheries. ) 
