|lpktons' Science fct-00Rs. 



ELEMENTS OF ZOOLOGY. 



BY 



CHARLES FREDERICK HOLDER, LL. D., 



FELLOW OF THE NEW YORK ACADEMY OF SCIENCES, CORRESPONDING MEMBER 



OF THE LINN^AN SOCIETY; AUTHOR OF A " LIFE OF CHARLES DARWIN,'' 

 "NATURAL HISTORY OF THE ELEPHANT," "ANIMAL PHOSPHOR- 

 ESCENCE," " A STRANGE COMPANY," " MARVELS OF ANIMAL 



LIFE," "ALONG THE FLORIDA REEF," ETC. 

 AND 



JOSEPH BASSETT HOLDER, M. D., 



LATE CURATOR OF INVERTEBRATE ZOOLOGY, AMERICAN MUSEUM OF NATURAL 



HISTORY, NEW YORK ; AUTHOR OF " THE GROWING WORLD," U THE 



MUSEUM OF NATURAL HISTORY," " FAUNA AMERICANA," 



"THE ATLANTIC RIGHT WHALE," ETC. 



NEW YORK : CINCINNATI -: CHICAGO: 



AMERICAN BOOK COMPANY. 



