PLATE V. 



FIG. i. Micrura verrilli sp. nov. Virgin Bay, Prince William Sound. Natu- 

 ral size. 



2. Side view of head of same species. 



3. The same ; contracted. 



4. Cerebratulus longicep* sp. nov. Yakutat. Enlarged i# times. 



5. 6, 7. Heads of same species, from lateral, dorsal, and ventral aspects re- 



spectively. 



8. Lineus torquatus sp. nov. Orca, Prince William Sound. Natural size. 



9. L. torquatus. Side view of head. 



10. Amphiporus bimaculatus sp. nov. Victoria, B. C. Natural size. 



(94) 



