74 THE GEOLOGICAL EVIDENCES 



an intermediate position. The skull exhibits a par- 

 tial attenuation anteriorly, the premaxillaries are 

 directed about equally downward and forward, 

 and the nasal bones are measurably contracted in 

 size. The horns likewise furnish characters which 

 further serve to establish this dual relationship. 



There is still one phase of development which 

 remains to be considered the development of 

 intellect or brain force. Although seemingly an 

 intangible subject, geology affords evidence in re- 

 gard to it fully as important as that which attaches 

 to the development of bone or muscle. No abso- 

 lute relationship has as yet been determined to ex- 

 ist between the size of the brain and mental capac- 

 ity, the latter being largely, or even principally, 

 dependent upon the quality of the brain mate- 

 rial, but, in a general way, it may be admitted 

 that the larger the brain in proportion to the 

 body, the greater will be the amount of brain 

 force generated by it. Using this most legit- 

 imate standard as a basis for comparison, 



