THE INTERNATIONAL SCIENTIFIC SERIES. 



AN INTEODUCTION 



TO THE 



STUDY OF ZOOLOGY, 



ILLUSTRATED BY THE 



CKAYFISH 



BY 



T. H. HUXLEY, F. E. S. 



WITH EIGHTY-TWO ILLUSTRATIONS. 



NEW YORK: 

 D. APPLETON AND COMPANY, 



1, 3, AND 5 BOND STREET. 



1888. 



