GENERAL BIOLOGY 



A Book of Outlines and Practical Studies 

 for the General Student 



By JAMES G. NEEDHAM, Ph.D. 



PROFESSOR OF LIMNOLOGY AND GENERAL BIOLOGY IN 

 CORNELL UNIVERSITY 



287 TEXT FIGURES. AND 

 9 PORTRAITS 



SIXTH EDITION 



ITHACA, N. Y. 



THE COMSTOCK PUBLISHING CO. 

 1914 



