UNIVALVES TROCHUS. 



85 



There are several reverse varieties of Trochi: tlie prin- 

 cipal are — ^Trochus Perversus, Undiilatus, Ventricosus, 

 Aimulatus, and Pusillus; the latter of which is found 

 within larger shells, among the sands of India. 



The Flumineus is a river species, and the Hortensis is 

 an inhabitant of the gardens in warmer climates. The 

 Terrestiis is also a land species, and frequents the moun- 

 tains of Cumberland. 



Amongst the fossil species, there are two with the 

 whorls contrary, viz. Trochus Ferrugineus, and Trochua 

 Novus: the former of which is found near Staphusia, con- 

 verted into iron-ore. The Trochus Schrceteri is also 

 found fossil in Campania. 



The following are the places which yield specimens of 

 the Trochi, viz. Asia, Africa, America, Friendly Isles, 

 New Zealand, Red Sea, Mediterranean, the European 

 and British seas, &c. &c. &c. 



TROCHUS. 



Niloticus. 



Maculatus. 



Perspectivus. 



Hybridus. 



Cruciatus. 



*Pharaonis. 



* Magus. 



Modulus. 



Muricatus. 



Scaber. 



Varius. 



*Cinerarius. 



Divaricatus. 



*Umbilicaris. 



Solaris. 



Tectum. 



Con us. 



Spinosus. 



Jujubinus. 



Alveare. 



Concavus. 



Vernus. 



Conspersus. 



Tentorium. 



Ochroleucus. 



Stellatus. 



Spengleri. 



Costatus. 



Inaequalis. 



Regius. 



Verrucosus. 



Cylindricus. 



Radiatus. 



