224 ECONOMIC ZOOLOGY AND ENTOMOLOGY 



Other species of clams and two or more kinds of scallops, 

 Pecten, occurring along the Atlantic coast, are used for food. 

 The scallops differ from the clams in having deep grooves 

 radiating from the hinge to the edge of the shell. Some are 

 beautifully colored. The meat of many of them is very dainty. 



The soft clam has been in- 



troduced into the waters of 

 the Pacific Coast States, doubt- 

 less with the shipments of 

 eastern oysters. There it is 



FIG. 102. Soft-shell 

 clam, Mya arenaria L. 

 (Reduced.) 



FIG. 103. A geoduck or 

 giant cla.m,Glycimeris generosa, 

 which attains a weight of five 

 or six pounds. (M u c h 

 reduced.) 



known as the "eastern" clam, but has not yet found 

 much favor in the markets because there are several native 

 species that are more in demand. One of the most common 

 of these is the hard shell or little-neck, Tapes staminea, 

 which seems to take the place of the hard clam of the east 

 coast. The great Washington clam, Schizotharus nuttalli, and 

 the butter-clam, Saxidomus nuttalli, are common in many 

 places on the northwest coast. One of the most remarkable 

 clams in the United States is the giant "geoduck" (earth 

 duck), Glycimeris generosa, which sometimes weighs as much as 



