THE UPPER LIMB IN MAX. 



239 



folds, the proximal from the radial to the ulnar sides ; the 

 distal from the ulnar to the web of the 2d and 3d dibits. 



Fig. 8. 

 Palm of human hand, showing the direction of the great tegumentary folds. 



The human hand may be hollowed into a cup, and it can 

 grasp a sphere. It is an instrument of manipulation co- 

 extensive with human activity. 



c. The hand of the ape is an imperfect hand, with clearly 

 defined points of difference and inferiority, when compared 

 with the human hand. Its thumb is short and feeble, and 

 ihti axrs of the metacarpo-phalangeal articulations of the 

 fingers are inclined towards the thumb. It can embrace a 

 cylinder, as the branch of a I ree, and is principally subservient 

 to the arboreal habits of the animal. Its fingers grasp the 



Cylinder in :i BCrieS Of spirals. The proximal and distal grooves 

 VOL. I. R 



