ml 



THE 



BIOLOGY OF THE FROG 



SAMUEL J. HOLMES, Ph.D. 

 /// 



ASSISTANT PROFESSOR OF ZOOLOGY IN THE UNIVERSITY 

 OF WISCONSIN 



SECOND EDITION 



NeiM gorft 

 THE MACMILLAN COMPANY 



LONDON: MACMILLAN & CO., LTD. 

 1907 



All rights reserved 



