PLATE IV. 



Pseudocalanus armatus. 



Fig. 1. Female seen from left side. 



2. Anterior antenna of female. 



3. Anterior antenna of male. 



4. Mandible and palp. 



5. Maxilla ; b branchial plates. 



6. Anterior foot-jaw. 



7. Posterior foot- jaw. 



8. Foot of second pair. 



9. Terminal spine of swimming foot. 



10. Foot of fifth pair of male. 



11. Abdomen of female. 



