BULLETIN 



OF THF. 



Jllinois 2 tate Laboratory 



OF 



NATURAL HISTORY, 



Urbana, Illinois. 



VOLUME V. 



ARTICLE II. — A CONTRIBUTION TO A KNOWLEDGE OF 

 NOR Til AMERICAN FRESH- \VA TER CYCLOPID.E. 



By ERNEST R. FORBES, B. S. 



Illinois State Laboratory of Natural History, 

 URBANA, ILLINOIS. 



1897. 



