%»%^ 



THE 



BIOLOGY OF THE FROG 



BY 



SAMUEL J. HOLMES, Ph.D. 



ASSISTANT PROFESSOR OF ZOOLOGY IN THE UNIVERSITY 

 OF WISCONSIN 



TIJIKD EDITION 



THE MACMILLAN COMPANY 



LONDOiN: MACMILLAN & CO., Ltd. 

 I916 



All rights reserved 



