UNIVALVES. STROM BUS. 99 



It may be observed, that the three last are land species, 

 and are characterized by their elongated or turretted 

 shape, and having their whorls more or less beset with 

 sharp knobs or prickly spines. One species of Strombus 

 is remarkable for having its whorls turned contrary, it is 

 the Strombus sinister, or left-handed Strombus, and is 

 found fossil in Helvetia. 



The Strombus spinosus is also found fossil. The 

 Strombus fissurclla is sometimes to be met with in India 

 in a recent state, but is more frequently found fossil in 

 Campania and in England. 



The African, Indian, American, and European oceans 

 alike furnish their supplies of this genus, and some feu- 

 are indebted to the Mediterranean, Red, and Arctic sens 

 for their existence. 



ST'ROMBVS.-Screw. 



A. The lip projecting into linear divisions or daws. 

 Fusus {Spindle.) Scorpius {Scorpion.) 



*'Pes-peyican\{Pelica7isfoot.) Lambis {Spider.) 

 Chiragra {DeviVs claw.) Millepeda {Millepede.) 



Clavus. 



B. Lohed. 

 Lentiginosus {Frog.) PugiHs. 



Fasciatus. Alatus. 



Raninus. Marginatus. 



Gallus {Plough.) Luhuanus. 



Auris Dianae {Ass's Ear.) Gibberulus {Poivter.) 

 Oniscus. 



11 2 



