THE LIFE OF INLAND 

 WATERS 



An elementary text book of fresh-water biology 

 for American students 



By 

 JAMES G. NEEDHAM 



Professor of Limnology in Cornell University 

 and 



J. T. LLOYD 



Instructor in Limnology in Cornell Unix srsity 



191b 



THE COMSTOCK PUBLISHING COMPANY 



ITHACA, NEW YORK 



