PLATE V. 



Cyclops serrulatus. 



1. Female. 4. Antenna of very young. 



2. Antenna of elongated form. 5, Stylet of elongated form. 



3. Stylet of ordinary form. 



6. Cyclops navus, antenna. 



7. Fupca. 11. FifiU foot. . 



8. Abdomen of young. 12. Antenna of young. 



9. Abdomen of male. 13. *' male. 

 10 Opening of spermatophore. ^ 



14 (7. " signatus,'' raaxilliped. 



15. C. navus, swimming foot of first pair. 



16. " '* " second pair. 



17. Maxillipeds. 



