46 THE BEAUTIES OF NATURE CHAP. 
dications of descent from ancestors in which 
these organs were fully developed. Again, 
though used for such different purposes, the 
paddle of a Whale, the leg of a Horse and of 
a Mole, the wing of a Bird or a Bat, and the 
arm of a Man, are all constructed on the same 
model, include corresponding bones, and are 
similarly arranged. The long neck of the 
Giraffe, and the short one of the Whale (if 
neck it can be called), contain the same 
number of vertebre. 
Even after birth the young of allied species 
resemble one another much more than the 
mature forms. The stripes on the young 
Lion, the spots on the young Blackbird, are 
well-known cases; and we find the same law 
prevalent among the lower animals, as, for 
instance, among Insects and Crustacea. The 
Lobster, Crab, Shrimp, and Barnacle are very 
unlike when full grown, but in their young 
stages go through essentially similar metamor- 
phoses. | 
No animal is perhaps in this respect more 
interesting than the Horse. The skull of a 
Horse and that of a Man, though differing so 
_ at atte 
