<£ 



4 



PLANKTON STUDIES ON LAKE MENDOTA. I. 



THE VERTICAL DISTRIBUTION OF THE PELAGIC 

 CRUSTACEA DURING JULY, 1894. 



E. A. BIRGE, 



Professor of Zoology, University of Wisconsin, 



ASSISTED BY 



O. A. Olson and H. P. Harder. 



From the Transactions of the Wisconsin Academy of Sciences, Arts, 



and Letters, Vol. X. 



[Issued June, 1895.] 



