No. 25. STROMBUS. 



Skrew Shell. Inhabitant a Limax. 



Shell univalve and spiral, lip of the aperture often much dilated and pro- 

 duced into a groove, leaning to the left. The young shells of the Strombus 

 do not possess the dilated lip, and have, therefore, been referred to different 

 genera ; an error committed by some of the best early writers. 



The greater part of the shells which constitute the first and second divisions, 

 have their outer lip extended, either in the form of a wing, (hence called 

 Alatas, or Winged shells,) or projecting in distinct linear divisions, or pointed 

 claws: but these appearances are only manifest in adult shells. These are 

 all inhabitants of the ocean, and usually found on rocky shores in the African, 

 Indian, American and European seas : some few are also found in the Medi- 

 terranean, Red, and Arctic seas. 



This genus derives its name from some of its species bearing the resem- 

 blance to a whipping-top, (<jt§o/3o$-.) 



DIVISION I. Shell with linear segments or claios at the margin of the 



outer Up. 



Scientific name. 



Chiragra, 



Scorpius, 



Lambis, 



Millepeda, 



Locality. 

 China, Mauritius. 

 Amboyna, China. 

 S. Seas, Asia, Red Sea. 

 Chi., Ceyl., Coromandel. 



Scientific name. 

 Purpureus, 

 Elongatus, 

 Truncatus, 

 Pes Pelicani, 



Locality. 



E. Indies, China. 

 Britain, Med., Norway. 



DIVISION II. Shell ivith the outer lip much expanded. 

 Family 1st. With the margin of the outer lip thickened or lohed. 



Gigas, 



Accepeten, 



Gallus, 



Tricornis, 



Pugilis, 



Fasciatus, 



Lentiginosus, 



West Indies, America. 

 Asiatic Ocean. 

 West Indies. 



do. Red Sea. 



do. Florida. 

 Jamaica, Goree. 

 Amboyna, China, Maurit. 



Papilio, 



Auris Dianse, 



Pacifica, 



Granulatus, 



Polyfasciatus, 



Luhuanus, 



Canarium, 



East Indies. 



Amb., China, As. Ocean. 



So. Seas. 



California. 



Red Sea. 



So. Seas. 



E. Indies, Red Sea. Amb. 



