MOLLUSCA. 



277 



Fio. 242. Top-shell (Turbo marnio- FIG. 243 Strombus gigas, or " Winged- 

 ruttw); one fourth natural size. shell;" one fifth natural size. Weal 



China seas. Indies. 



FIQ. 244. Paludina, a Fresh- water Fio. 245. -Key-hole Limpet (FixmreUa 

 Snail. linteri). West Indies. 



FIG. 246. Ear-shell (H. titberctilata),-an& Dog-whe!k (.Vawa retMilata). Engl.cid. 



