VERTEBRATA. 
359 
Apes as regards the skeleton, but comes nearest to Man 
in the form of the brain. The Chimpanzee approaches 
Man more closely in the character of its cranium and 
teeth, and the proportional size of the arms. The Gorilla 
is most Man-like in bulk (sometimes reaching the height 
of five feet six inches), in the proportions of the leg to 
the body and of the foot to the hand, in the size of the 
heel, the form of the pelvis and shoulder-blade, and vol¬ 
ume of brain. 185 
Man differs from the Apes in being an erect biped. 
In him, the vertebrate type, which began in the horizon¬ 
tal Fish, finally became vertical. No other animal habit¬ 
ually stands erect; in no other are the fore-limbs used 
exclusively for head-purposes, and the hind pair solely 
for locomotion. 
His limbs are naturally parallel to the axis of his body, 
not perpendicular. They have a near equality of length, 
but the arms are always somewhat shorter than the legs. 
In all the great Apes the arms reach below the knee, and 
the legs of the Chimpanzee and Gorilla are relatively 
shorter than Man’s. 
Man only has a finished hand, most perfect as an organ 
of touch, and most versatile. Both hand and foot are 
relatively shorter than in the Apes. The foot is planti- 
