TWENTIETH CENTURY TEXT-BOOKS 



ANIMAL LIFE 



A FIRST BOOK OF ZOOLOGY 



BY 



DAVID STARR JORDAN, PH. D., LL. D. 



PRESIDENT OF LELAND STANFORD JUNIOR UNIVERSITY 

 AND 



VERNON L. KELLOGG, M.S. 



PROFESSOR IN LELAND STANFORD JUNIOR UNIVERSITY 



NEW YORK 



D. APPLETON AND COMPANY 

 1907 



