162 THE GENERAL ANATOMY OF GORILLA [SECT. A 



(g) A vortex is indicated at the wrist near the styloid process 

 of the radius. There seems to be a tendency to the production of 

 vortices near parts of the skeleton (such as this, the clavicle, and 

 the anterior iliac spine) which lie immediately beneath the skin. 



Fig. 103. Cutaneous grooves on the palm (vola) of a young Gorilla in 

 the Cambridge Collection (1/1). 



C. Skin Colour. The exposed parts of the skin are of 

 uniform colour, viz. a dark slate-grey or black. Even the youngest 

 specimens are as darkly pigmented as adult examples. The 



