THE COMMON FROG. 



CHAP. 



The head and body of the Frog together form an 

 elongated oval mass, somewhat pointed at each end, 

 of which mass the head constitutes rather more than 

 one-third. This mass is more or less flattened both 

 above and below, except at the commencement of 

 the hinder third of the back, where there is a more or 

 less marked prominence, which indicates the junction 



Fig. I. — The Common Frog, Ratia teiiiporaria. 



of the haunch bones with the spine. In front of this 

 the only marked projections are those of the eye- 

 balls. 



The short arms project outward on each side just 

 behind the head, and each ends in a small hand with 

 four fingers, the second of which is the shortest, and 

 the third the longest. When the arm is turned back- 



