~ 
THE OWENS COLLEGE 
~ COURSE OF ELEMENTARY BIOLOGY. 
Parr LI. 
THE FROG: 
AN INTRODUCTION TO 
ANATOMY AND HISTOLOGY. 
BY 
ie MILNES MARSHALL, M.D., D.Sc., M.A., F.B.S., 
rhe OF ST. JOHN’S COLLEGE, CAMBRIDGE; 
BEYER PROFESSOR OF ZOOLOGY IN OWENS COLLEGE, 
SECOND EDITION. 
REVISED AND | c@aliht!SO: NAW oe 
HIgh Ye bh 
J. E. CORNISH, 33 
LONDON : a 
SMITH, ELDER, & CO., WATERLOO PLACE 
1885. 
