WISCONSIN GEOLOGICAL AND NATURAL HJSIORY SURYEY. 



E. A. BIRQE, Ph.D. Sc.D., Director. 



BULLETIN NO. XII. SCIENTIFIC SERIES NO. 3. 



THE PLANKTON 



OF 



Lake Winnebago and Green Lake 



BY 



C. D WIGHT MARSH 



Professor of Biology in Ripon College. 



MADISON, WIS. 



PUBLISHED BY THE STATE. 



October, 1903. 



