A 



MANUAL OF ZOOLOGY 



FOR THE USE OF STUDENTS 



WITH A GENERAL INTRODUCTION ON THJJ 

 PRINCIPLES OF ZOOLOGY 



BY 



HENRY ALLEYNE NICHOLSON 



M.D., D.Sc., M.A, Ph.D. (Gai-T.), F.R.S.E., F.G.S. 



PROFESSOR OF NATURAL HISTORY AND BOTANY IN UNIVERSITY COLLEGE, TORONTO : 



POKMERLY LECTURER ON NATURAL HISTORY IN THE MEDICAL SCHOOL OF EDINCUR<;H ; 



VICE-PRESIDENT OF THE GEOLOGICAL SOCIETY OF EDIMUURCH, ETC. 



AUTHOR OF 'ADVANCED TEXT-BOOIC OF ZOOLOGY FOR THE USB OF SCHOOLS;' 



* TEXT-BOOK OF GEOLOGY ; ' 



•essay ON THE GEOLOGY OF CUMBERLAND AND WESTMORELAND;' 



'ORAPTOLITSS OF THE SKIDOAIV SERIES/ ETC. ETC. 



SECOND EDITION 



REVISED AND CONSIDERABLY ENLARGED 



-KEW YORK: 

 D. APPLETON AND COMPANY, 



649 & 651 BROADWAY. 



1877. 



