54. Wrinkled purples, Thais lamcllo-sa. ii;mu'd for the purple 

 dve they excrete, fasten their vase-shaped egg capsules to the 

 undersides of rocks. They are the American west coast coun- 

 terpart of the purples, or dog whelks, of Atlantic shores. 

 (Oregon. Ralph Buchsbaum) 



56. The flat periwinkle, Littorina littoralis. of 

 temperate and cold Atlantic shores, depends 

 on large seaweeds for food and for keeping 

 moist when the tide is out. (England. Ralph 

 Buchsbaum) 



55. The largest moon snail of the American Pacific coast, Polinices leivisii, averages 

 more than 4 inches long. The fleshv foot envelops most of the shell as the animal pushes 

 through sand and feeds on other mollusks. (Cv La Tour and Marineland of the Pacific) 



