LIFE OF INLAND 

 WATERS 



An elementary text book of fresh-water biology 

 for American students 



By 



JAMES G. NEEDHAM 



Professor of Limnology in Cornel! University 



J. T. LLOYD 



Lnstructor in Limnology in Cornell University 



1916 



THE COMSTOCK PUBLISHING COMPANY 



ITHACA, NEW YORK 



L.L, 



