354 BULLETIN OF TIIE UNITED STATES FISH COMMISSION. 



PlG. l. — Schizotharvs nuttaUii Conrad. Trestts inaximus Midd. ; Gray. Lutraria ca2>ax Gould. 

 "West Coast, United Stales ; Paget Sound to San Diego, California. 



U Specimen of ordinary size, reduced about one-fourth in length. The siphons are somewhat con- 

 tracted ; tho foot (F) expands about as usual. 

 II. Outline of the left valve of a larger specimen, reduced to the same extent. 

 The straight line below the Biphona represents a length of ouo inch on tho figures. 

 Drawn from nature by R. E. C. Stearns. 



