MOLLUSCA. 965 
Fic. 233. —Top-shell (Turbo marmo- Fic. 234.—Strombus gigas, or ‘* Winged=- 
vatus); one-fourth natural size. shell;” one-fifth natural size. West 
China seas. Indies. 
Fig. 235.— Paludina, a Fresh- water Fia. 236.—Key-hole Limpet (Misswrella 
Snail. listeri). West Indies. 
Fig. 287.—Ear-shell (H. tuberculata), and Dog-whelk (Nassa reticulata). England. 
