MOLLUSCA 



133 



FIG. 102. Top Shell (Turbo marnto- 

 ratus) ; one fourth natural size. 

 Australia. 



FIG. 103. Strombus gigas, or ''Wing 

 Shell"; one fifth natural size. West 



FIG. 104. Paludina, a fresh-water 

 snail. 



FIG. 105. Key-hole Limpet (Fissurella 

 listen"} . West Indies. 



FIG. 106. Ear Shell (//. tuberculata} , and Dog Whelk (Nassa reticulata) . England. 



