CantLocaniptns illiuoisensis. 



Fig. 



1. Antenna of female. 



2. Fifth foot of female. 



3. Antennule. 



4. First foot. 



5. Caudal stylet. 



Canthocamptiis uorthumbricvis var. americanus, 



6. Fifth foot of female. 



7. Antenna of female. 



8. Maxilliped. 



9. Caudal stylet. 



10. Antenna of male. 



11. First foot. 



12. Fourth foot. 



13. Fifth foot of male. 



14. Frontal area. 



15. Caulhocaniptus temiieaiidis. Stylets. 



16. ^' teiiuicaudis. Fifth foot of female. 



Cyclops serrulatus. 



17. Fifth foot. 



18. Fourth foot. 



19. Outer ramus of first foot. 



Canthocamptiis northumbriciis. 



20. Inner ramus of third male foot. 



21. Beak. 



22. Maxilla. 



