UNIVALVES. TURBO. 121 



South seas; some are from the American and African 

 oceans, and the Indian and Northern seas; and several 

 species are to be met with in the Mediterranean, and Euro- 

 pean seas. 



TURBO Wreath. 



DIVISION I. SHELL IMPERFORATE, AND THE PILLAR-LIP 

 FLAT. 



FAMILY 1. With a smooth exterior. 

 Obtusatus Blunt. *Rudis Pale-brown. 



Neritoides Nerite- shaped. Punctatus Punctured. 



Nicobaricus Nicobar. *Petrseus Small-rock. 



Nigerrimus Black. . *Fulgidus Bronze-banded. 



FAMILY 2. With the exterior striated or ribbed. 

 *Littoreus Periwinkle. *Crassior Coarse. 



*Tenebrosus Chocolate. *Jugosus Lineated. 



Ethiops Black and white. 



DIVISION II. SHELL IMPERFORATE, SOLID. 



FAMILY 1. With a smooth exterior. 

 Personatus Convex. Cidaris Turban. 



Petholatus Serpent' s-skin. Helicinus Green and purple. 



Imperialis Imperial. 



FAMILY 2. With the exterior striated. 

 *Cimex Bug. Cochlus Cameleopard. 



*Calathiscus Cancellated. Smaragdus Green. 



FAMILY 3. With the exterior granulated. 

 Castaneus Chesnut. Crenulatus Crenulated. ' 



Papyraceus Paper. 



FAMILY 4. With the exterior nodulous. 

 Trochiformis White- grain' d. Sarmaticus Large-knobbed. 

 Marmoratus Marbled. Olearius Large-keeled, 



C oronatus Coronated. 



