COMPARATIVE ZOOLOGY 
STRUCTURAL AND SYSTEMATIC 
FOR USE IN 
Schools anO Colleges 
BY 
V 
St^ 19 I B9< 
- Of WAS#'- ' 
.•JAMES ORTON, A.M., Ph.D. 
LATE PROFESSOR OF NATURAL HISTORY IN YA8SAR COLLEGE, CORRESPONDING 
MEMBER OF THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA 
ANl) OF THE LYCEUM OF NATURAL HISTORY, N. Y., ETC. 
/ 
NEW EDITION, REVISED BY 
CHARLES WRIGHT DODGE, M.S. 
PROFESSOR OF BIOLOGY IN THE UNIVERSITY OF ROCHESTER 
“ The education of a naturalist now consists chiefly in learning how 
to compare." —Agassiz 
NEW YORK 
HARPER & BROTHERS PUBLISHERS 
1894 
