FIG. 57. 
58. 
59- 
60. 
List of Illustrations. 
A series of embryos at three comparable and progressive 
stages of development, representing cach of the classes 
of vertebrated animals below the Mammalia 
Another series of embryos, also at three comparable and 
progressive stages of development, representing four dif- 
ferent divisions of the class Mammalia 
Diagram of geological succession of the classes of the 
Animal Kingdom = 
Skull of Oreodon Caithertiont 
61, 62. Horns of Cervus dicrocerits 
” C. matheronis 
” C. pardinensis . 
oe C. tsstodorensis . 
3p C. Sedgwickit , 
. Successive stages in the development ofa an existing Deer’ s 
Antlers. ‘i 
. Homocercal tail 
. Heterocercal tail 
. Vertebrated but symmetrical fit (aiphycereal 
. Tail of Archeopteryx . i . c . 
. Tail of modern Bird 2 
. Archaeopteryx macura, restored. i 5 e 
. Skeleton of Polar Bear 
. Skeleton of Lion 
. Anterior limb of Man, Dog, Hes Sheep, and Hirse 
. Posterior limb of Man, Monkey, Dog, Sheep, and Horse 
. Posterior limb of Baptanodon discus, and anterior limb of 
Chelydra serpentina 
. Paddle of a Whale ‘ . 
. Fossil skeleton of Phenacodus primavus 
. Bones of the foot of four different forms of the perisso- 
dactyl type 
. Bones of the foot of four difercat finch at the artiedactyl 
type 
. Feet and teeth in fosdil epee oF the Horse 
Palaotherium. (Lower Tertiary of Paris Basin) 
. Hipparion. (New World Pliocene) 
. Comparative series of Brains . 
. Ideal section through all the above stages 
. Skulls of Canadian Stag, Cervalces Amertcanus, and Elk 
. Transmutations of Plaxorbis . 
xill 
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