LAMP-SHELLS AND THEIR ALLIES 



15 



as the last lives in the sea 



where the water is cold 



and deep. It has a very 



wide range, extending 



from oif Santa Cruz, 



Cal., up past Alaska and 



down to the Philippine 



Islands. The color is 



waxen white, with stains 



of brown. 



Platidea anomiiioides^ 



Sacchi, the Little Lamp- 

 shell, is not much larger 



than the head of a good 



sized pin. It is quite fiat, 



without distinct sculptur- 

 ing, circular in outline, Fig.2(*) 



and light brown in color, but 

 it has a distinctive hole in one 

 valve. My specimens came 

 from San Pedro Bay, and 

 lived under 600 feet of sea- 

 water. This species is also 

 ^*s-3(*) found in the Mediterranean 



Sea and other parts of the 



ocean. 



We have in Figures 3 and 



4 two views of another brachi- 



opod, T'erebratalia occiden- 



/(^//i, Dall,the Western Lamp- 

 shell. The figures are of the 



natural size, as is indicated by ^.^ ^ ^^^ 



