ANIMAL LIFE FORMATION. 293 



moved by the feet and hands, which have in 

 themselves a stage self -movement and so are 

 distinctly animal, being controlled directly or 

 voluntarily by the central organ. 



The Lower and the Upper Extremities they 

 are usually called, as they shoot out from the 

 lower and upper sides of the Trunk. Bi-lat- 

 eral symmetry of the one member now be- 

 comes two-membered, doubly so; each side 

 rays forth separately above and below. The 

 bond which held the double Trunk together 

 seems to break, and from each of its four 

 corners it throws a limb. At this point the 

 vegetal nature of the animal Trunk is again 

 suggested, though the root and the branch 

 have undergone a unique evolution into the 

 leg with foot and the arm with hand. Of these 

 the former still steadies and connects the 

 Trunk with the earth, though not fixing the 

 same therein; the latter still extends its flat 

 leaf-like palms, though with the added power 

 of grasping. 



The hand was once taken as, the distinctive 

 mark of the human species (hence called Bi- 

 mana], in contrast with next lower species of 

 animals. The hand and the foot in their sep- 

 arate forms are connected with the erect posi- 

 tion of man. From the beginning of the ani- 

 mal Form, it must have had the impulse to- 

 ward elevating its head and standing upright. 



