Chap. XXI.] 



OF THE HUMAN BRAIN. 



387 



are to be encountered in this organ in different Europeans. 

 In some of them a brain is to be met with which appro:si- 

 mates closely as regards size, relative development of 

 lobes, and complicacy of convolutions, to the low standard 



Fig. ]4l.— Brain of Gauss, the Celebrated Mathematician and Astronomer, upper 

 aspect. (Sharpey, after R. Wagner. ) 



I, I, Longitudinal fissure ; a, a', a", upper, middle and lower frontal convolutions ; 

 A, A, ascending frontal convolution ; r, r, fissure of Rolando ; B, B, ascending 

 parietal convolutions ; b, b, parietal lobule ; b", supra-marginal lobule ; c, c', first 

 or upper temporal convolution ; p, perpendicular (or parieto-occipital) fissure ; 

 d, d', a", upper, middle, and lower occipital convolutions. 



afforded by the brain of the Bush woman. In others, the 

 majority of characters are decidedly higher, though in 

 certain parts or situations there may be presented now one, 

 now another, feature of a lower type. 



All sorts of grades 



