PLATE V. 



Figs. 1-6. Calamus gracilis, Dana. 



Fig. 1. Female, seen from above, magnified 20 diameters. 



Fia. 2. Maxilla, 



Fig. 3. Terminal seta of first foot. 



Fig. 4. Foot of fourth pair (female). 



Fig. 5. Foot of fourth pair (male). 



Fig. 6. Right fifth foot of male. 



Figs. 7-16. Phyllopus bidentatus, n. gen. and sp. 

 Fig. 7. Anterior antenna (male ?). 

 Fiff. 8. Mandible. 

 Fig. 9. Maxilla. 

 Fig. 10. Anterior foot-jaw. 

 Fig. 11. Posterior foot-jaw. 

 Fig. 12. Fifth pair of feet (male ?)• 



Fig. 13. Posterior thoracic angle and lateral view of abdomen. 

 Fie. 14. Anterior view of abdomen. 

 Fig. 15. Terminal spines of one of the swimming feet. 

 Fie. 16. Rostrum. 



