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“COMPARATIVE ZOOLOGY, 
STRUCTURAL AND SYSTEMATIC. 
FOR USE IN SCHOOLS AND COLLEGES. 
By JAMES ORTON, Pu.D., 
PROFESSOR OF NATURAL HISTORY IN VASSAR COLLEGE: CORRESPONDING MEMBER OF 
TUE ACADEMY OF NATURAL SCLENCES, PHILADELPHIA, AND OF THE 
» LYOEUM OF NATURAL HISTORY, NEW YORK; AUTHOR 
oF ‘‘ THE ANDES AND THE AMAZON,” ETC. 
- 
“The education of a naturalist now consists chiefly in learning how to 
compare.” —AGASSIZ. 
NEW. YORE: 
HARPER & BROTHERS, PUBLISHERS, 
FRANKLIN SQUARE. 
1880. 
