LIST OF ILLUSTRATIONS. 



Pa/se. 



FIG. 1. Pancolus californiensis 5 



2. Pancolus californiensis. First gnathopod 5 



3. Pancolus californiensis. a, First antenna, b, Second antenna 5 



4. Pancolus californiensis. Mandible 6 



5. Pancolus californiensis. Maxilliped 6 



6. Pancolus californiensis. Epignath of rnaxilliped '. 6 



7. Pancolus californiensis. Posterior lip 6 



8. Pancolus californiensis. First maxilla 6 



9. Pancolus californiensis. First pieopod 6 



10. Pancolus californiensis. Second pieopod 6 



11. Tanais cavolinii (After Harger) 9 



12. Tanais cavolinii. a, First leg. b, Maxilliped. c, First antenna. 



d, Mandible, e, Uropod. /, Second antenna 9 



13. Tanais alascensis. a, First antenna, b, Second antenna 10 



14. Tanais alascensis. a, Dorsal view, b, Last joints of leg of the first 



pair 10 



15. Tanais robustus (After Moore), a, General figure, b, Second 

 antenna, c, Mandible, c', Detail of mandible, d, Anterior (first) 

 maxilla, d', Tip of first maxilla, e, Maxilliped. /, First gnath- 

 opod of male, g, First gnathopod of female, h, First pereiopod. 



i, Last pereiopod. .;', Pieopod. k, Uropod 13 



16. Tanais normani 15 



17. Tanais normani. First gnathopod 15 



18. Tanais normani. a, First antenna, b, Second antenna 15 



19. Cryptocope arctica (After Hansen) 16 



20. Cryptocope arctica (After Hansen). a, Antennse of female, b, Uro- 

 pod of female, c, Uropod of male, d, Anterior part of body of 



male 17 



21. Leptognathia caeca (After Harger). a, First antenna, b, Leg of 



first pair, c, Uropod 18 



22. Leptognathia longiremis (After Sars). a, First leg of female, b, 

 Second antenna of female, c, Lateral view of female, d, Dorsal 

 view of female, e, First antenna of female. /, Seventh leg of 

 female, g, Second leg of female, h, Maxillipeds. i, Anterior 

 (first or inner) maxilla, j, Uropod of female, k, Mandible (right). 

 I, Left mandible, m, Pieopod of female, n, First leg of male, o, 

 First antenna of male, p, Dorsal view of male, q, Lateral view 

 of male, r, Second leg of male, s, Uropod of male, t, Pieopod 



of male, u, Second antenna of male, v, Seventh leg of male 20 



23. Heterotanais limicola ( After Harger) . Female 22 



24. Heterotanais limicola. a, First leg of female, b, First antenna. 



c, Second antenna 22 



