PLATE I. 



Calanus finmarchicus. 



Fig. 1. Rostrum. 



2. Anterior antenna of female. 



3. Posterior antenna. 



4. Mandible and palp. 



5. Maxilla, (ft) branchial plates. 



6. Anterior foot-jaw. 



7. Posterior foot-jaw. 



8. Foot of fifth pair. 



9. Abdomen of female. 



10. Terminal spine of swimming foot. 



11. Right fifth foot of male. 



12. Terminal joints of anterior antenna of male. 



