46 
THE BONES. 
spending divisions of each are marked by similar 
letters. 
Here we see the legs both divided into three 
parts, exclusive of the actual foot. The first from 
a to b; the second from b to c ; the third from 
c to d. Now, without attending carefully to these 
divisions, we might be apt to conclude that birds 
have one more division than human beings : but 
this is not the case. The mistake on our parts 
arising, from the prevailing opinion, that the part c 
i) in the bird’s limb, is the part which corresponds 
with what we usually term the leg, namely, b to c, 
that is, from our knee to our ancle ; whereas, the bone 
B c in the limb of the bird is, in fact, its real leg- 
bone. For its thigh we must look still higher, hidden 
as it usually is amongst the feathers, and, probably, 
