A SYNOPTIC TEXT-BOOK 



OF 



ZOOLOGY 



FOR COLLEGES AND SCHOOLS 



BY 



ARTHUR WISSWALD WEYSSE, A.M., Ph.D. (Harvard) 



INSTRUCTOR IN ZOOLOGY AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY 

 AND ASSOCIATE PROFESSOR OF PHYSIOLOGY AT BOSTON UNIVERSITY 



Nefo gork 

 THE MACMILLAN COMPANY 



LONDON : MACMILLAN & CO., Ltd. 

 I9O4 



All rights reserved 



