PLATE I. 



Fig. i. Carinella capistrata sp. nov. A large individual' about natural size. 

 Virgin Bay, Prince William Sound. 



2. Carinella dinema sp. nov. Victoria, B. C. Enlarged 2%, times. 



3. Head of same species. Side view. Enlarged 4 times. 



4. Amphiporus bimaculatus sp. nov. Dorsal view of head. Glacier Bay. 



Enlarged 12 times. 



5. Cerebratulus herculeus sp. nov. A large individual. Sitka. Half nat- 



ural size. 



6. Tetrastemma bicolor sp. nov. Kadiak. Three times natural size. 



(86) 



