98 UNIVALVES. — BUCCINUM. 



the other species, as the B. subulatum and B. crenulatum, 

 are very beautiful. 



The B. sinuatum and the B. virgineum are fresh water 

 species. 



The African, American, Indian, European, and South- 

 ern oceans produce the greater part of the species; many- 

 are found on the British shores; and also some few in the 

 Mediterranean. 



This genus derives its name from some of its species be- 

 ing formed like a trumpet. 



BVCClNUM—fVhelk. 

 Division I. — Shell inflated, rounded, thin, slightly 



TRANSPARENT AND BRITTLE. 



Family 1. — Aperture without teeth. 

 Olearium — Tun. Perdix — Partridge. 



Galea — Brown. Dolium — Spotted. 



Can datum — Beaked. 



Family 2. — Outer lip toothed. 

 Sulcosum — Flat-ribbed. Chinense — Chinese. 



Division II. — Shell ovate, ribbed, aperture rathee 



CONTRACTED, PILLAR-LIP THICKENED AND STRONGLY 

 WRINKLED, AND OUTER LIP TOOTHED, THICKENED, AND 

 MARGINATED. 



Pomum — Thick'lipp'd, Ringens — Grinning. 



Division III. — Shell with tuberculated belts or ribs, 



PILLAR-LIP SPREAD, AND BEAK MUCH PRODUCED 

 AND REFLECTED. 



Echinophorum — Tuberculated Nodosum — Belted. 

 Tun. Rugosum — Rugged, 



