U. S. B. F.— Doc. 920. 



FIG. 7.— SHELL OF Macoma nasuta, NATURAL SIZE. 



It is called the "oyster clam" at Yaquina, where it is used as food to a slight extent. The 

 species was common on the north side of the bay in 1917. The photograph is of a shell from 

 AVinchester Bay and is somewhat larger than the average in Yaquina Bay. 



FIG. 8.— SHELL OF Paphya staminea, THE "LITTLE 

 NECK CLAM," NATURAL SIZE, FROM YAQUINA 

 BAY. 



The species occurs in almost all of the bays of the North- 

 west. It is one of the best market clams. 



FIG. 9. -SHELL OF Phola- 

 didea penlta, A ROCK 

 BORER, NATURAL SIZE. 



The species is characteristic 

 of Nye Beach, on the ocean side 

 of Newport, where it is plentiful. 



