12 



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, Raiia ien/poraria. 



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 fino-ers, the second of w^iich is the shortest, and 

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



