30 Bulletin 24 68 



plate 3 (10) 



Page 



Fig. 1. Ensis schniidti, n. sp 15 53 



Exterior of right valve of type, nat. size. 



2. Exterior of left valve of type. 



3. Inside view of right valve of a fragmentary specimen of 



the above species. 



4. Inside view of a left valve of same species. 



5. Sernele nelliana, n. sp 15 53 



Exterior view of left valve -of type, nat. size. 



6. Interior view of same specimen. 



7. Chione dalli, n. sp 19 57 



Exterior of left valve of type, slightly enlarged. 



8. Right valve of another specimen of same species, 



exterior view. 



9. Left valve of third specimen of the above species. 



