THE GEOLOGICAL AND NATUEAL HISTOHY SURVEY OF MINNESOTA. 

 N. H. WiNCHELL, State Geologist. 



A FINAL REPORT 



ON THE 



Crustacea of Minnesota 



INCLUDED IN THE ORDERS 



CLADOCERA AND COPEPODA, 



Together with a synopsis of the described species in North America, and keys 

 to the known species of the more important genera. 



By C. L. HERRIOK, Assistant in Zoology. 



MINNEAPOLIS : 

 JOHNSON, SMITH & HARRISON. 



1884. 



