PLATE 256. 



Fig. 2. 



Fig. 3. 



Fig. 1. The Quahaug or Little-necked Clam, Venus mercenaria. 



Natural size. 

 Fig, 2. The Qnahaiij? of Paget Sound, SaxUlomus nitfialli. 



Natural size of large specimen. Drawn by J. H. Emerton. 



Fig. 3. The Gaper Clam of the Wc8t Coast, Schlzoth ujrus nuf- 

 ialH (Conrad). 

 (I.) Specimen of ordinary size. rL'daced abitut ooe-fourth in li^nf^tli. 

 The siphons arc somewhat contracted; the foot (F) expands 

 about as usual. 

 (II.) Outline of the left valve of a larger specimen, reduced to the 

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



