TADPOLES AND FROGS. 189 
limbs are attached to the axial skeleton through the 
pelvic girdle. The bones of the arm consist of the 
humerus, or forearm, the radio-ulna, corresponding to 
Fic. 146.—Various Stages of Tadpole. 
the two bones, the radius and ulna in man, the carpal 
or wrist-bones, the metacarpal or hand-bones, and the 
fingers or phalanges. In the leg are the femur or 
thigh-bone, the shin-bone corresponding to the ‘67a 
Fic. 147.—Young Frogs. 
and fidula in man, the ¢arsal bones, two of which are 
much longer than the others, the me¢atarsal or ankle- 
bones and the phalanges (Fig. 152). 
Controlling the organs of motion and extending into 
