PLATE XX. 



Cyclops gigas (adult female). 



Fig. 1. Anterior antenna. 



2. Mandible and palp. 



3. Labrum. 



4. Maxilla and palp. 



5. Anterior foot-jaw. 



6. Posterior foot-jaw. 



7. Fourth foot ; apical joint of outer branch, 



8. Fourth foot ; apical joint of inner branch. 



9. Fifth foot. 



10. Abdomen and tail. 



The same, penultimate stage of development. 



11. Anterior antenna. 



12. Mandible and palp 



13. Posterior foot-jaw. 



14. One of swimming feet. 



15. Fifth foot. 



16. Abdomen and tail. 



