200 



MOLLUSKS: GASTEROPODS. 



Fig. 369. Pyrula. Much reduced. 

 Coast of United States. 



Fig. 368. Murex. Much 

 reduced. Molucca. 



Fig. 370. Tritonium. Coast 

 of New England. 



Fig. 371. Frog Shell, or Kanella. 

 Reduced. Australia. 



WHELKS. 



The Whelk is one of the most common of the Gas- 

 teropods. Figure 372 shows one species as it appears 

 when crawling up the glass sides of the aquarium 

 with the foot towards you. The Fusus, of the coast 

 of the United States, may be found upon the shore 

 after storms. The Harp Shell, of the Pacific, is always 



