MOLLUSCA. 



277 



FIG. 242. Top-shell (Turbo niarnio- FIG. 243. Strombms gigas, or "Winged- 

 ratus); one fourth natural size. shell;" one fifth natural size. West 



China seas. Indies. 



PIG. 244. Paludina, a Fresh-water FIG. 245. -Key-hole Limpet (Fissurella 

 Snail. listert). West Indies. 



246. Ear-shell (U. tuberculafa), uud Do^- 



