22s 



/i MI LOG Y. 



osseous head, tin- si/.e >f tin- iT;.ni;tl capacity, compared with 

 thr area of the face, is supposed to he in the ratio of the in- 

 telligence, with certain exceptions; as we recede from man. 

 tin 1 face becomes comparatively larger, and the cerebral cavity 

 smaller, proportionally to the face; the orbits are directed 

 more outwards, and cease to he distinct from the temporal 

 fossae; and the occipital condyles, which in man are found at 

 the base of the cranium, and which form the plane by which 

 the head rests on the vertebral column, recede more and more, 

 until they come to he placed almost on a line with the axis of 

 the body. The same happens with the jaws. Still, we find 

 always the same bones, the same form of articulation of tin- 

 lower jaw; between its condyles and the temporal hone then- 

 is no intermediate bone, as in birds, reptiles, hatrachia. and 

 fishes. 



Fi-. 171. Skeleton of the Camri i:H.) 



393. Various mammals are provided with horns. These 

 are sometimes mere appendages of the skin, and seem to be 



formed of the hair matted together: this i> the 



