MOLLUSCA. 



277 



Fig. 242. —Top-shell {Turho marmo- Fig. 243 Stromlnis gigm, or "WiDged- 



ratus)\ cue fourth natural size. shell;" cue fifth uatural size. West 



Chiua seas. ' Indies. 



Pig. 244. -—PahiMna, a Preah-water Fig. 245 — Key-hole Limpet (Fismrdla 

 Suail. liateri). West Indies. 



Fig. 246.— B8 ■•■shell (jff. tuherculata), and Dog-whelk {Naaaa reticulata). England. 



