UNIVALVES TROCHUS. 147 



Scientific Name. Locality. Common Nam£. 



Tessellatus St. Croix, Naples Tessellated Troch , 



Turbinatus Mauritius, Mediterranean Turbinated do • • 



Argyrostonius ■ New Zealand, Arabia • • • Silver-niouth'd do 



Merula China, South Seas Chinese • • • do • ' 



Crassus Britain • • • • Heavy .... do • • 



Americanus America American • do . • 



Family S.—Wit]i the pillar twisted. 



Mauritianus Mauritius, New Guinea • Great-tooth'd do 



Fenestratus Aniboyna, Frederick's Isl. Small-tooth'd do 



Pyramis South Seas, East Indies • • Obelisk •.• do •• 



Dentatus Red Sea, Guinea Sugar-loaf • do • • 



Family 4. — Shell convex, smooth, with a thick vitreous matter which 

 covers the centre of the base, 



Vestiarius Mediterranean, Cape of 



Good Hope, India • • • Flattened • • do • • 



Division III — Shell tapering, with the pillar exserted, and the shell 

 falling to one side whenplaced upon its base. 



Family 1. — With pillar twisted. 



Telescopiura East Indies Telescope • do • • 



Terebellus West Indies Little augur do • • 



Dolabratus Africa Zebra do • • 



Family 2. — Pillar straight. 



Minute Shells. 



Punctatus Mediterranean Dotted do • • 



Striatellus o Violet lipp'ddo • • 



L2 



