North Amcricait- Fresh-icafcr Cyclopidte. 65 



VI. Subgenus KncxjdopA Claus. 



15. Cyclops scrrulatiis Fischer. 

 Very common everywhere. 



16. Cijclops prasinus Fischer. 



Abundant in all sorts of waters in the Mississippi Valley, 

 Massachusetts, and Florida. 



VII. Subgenus Pto-dci/clops Claus. 



17. Cj/rlops jiJialeratia^ Koch. 



A rare species in Manitoba, Massachusetts, Alabama, and 

 the north central States. 



18. Cijclops fimhriatus var. poppei Rehberg. 



A rare species in Manitoba, Alal)ama, and the north central 

 States. 



19. Cyclops ((Jfiiiis Sars,_/7Wr Herrick. 



If this form occurs in America it is very rare, and limited 

 in its distribution. 



