E^UNCIPATION OF THE FORE-LIMBS 9 



on land. By its mobility it produces movement, hut if 

 does not support the weight of the animaVs body. It is a 

 propelling, but not a supporting, limb (see Fig. 4). A 



Fig. 2. — Human Forearm with the Hand turned Palmar 

 Surface Upwards — Supinated. 



Fig. 3. — Human Forearm with the Hand turned Palmar 

 Surface Downwards — Pronated. 



Fig. 4. — Diagrammatic Outline of a Primitive Type op 

 Vertebrate with Propelling, but not Supporting, 

 Limbs. i 



very near approximation to our ideal primitive limb is 

 seen in the ordinary water newt. We may readily appre- 

 ciate, in watching such an animal, the perfection with 



