CHAP. XXL] OF THE HUMAN BRAIN. 379 



lavity and symmetry of the cerebral convolutions in the 

 lower species of animals. There is, in this respect, 

 between the brain of a white man and that of this Bos- 

 jesman woman a difference such that it cannot be mis- 

 taken ; and if it be constant, as there is every reason to 

 suppose it is, it constitutes one of the most interesting 

 facts which have yet been noted." 



The most complete description we at present possess, 

 however, of the Brain of a representative of one of these 

 lower races has been given by Prof. Marshall in his 

 Memoir on the brain of a Bushwoman.* The organ in 

 this South African woman was decidedly small, as will 

 have been gathered from what has been said in regard 

 to it in the last Chapter (p. 359). Certain portions of 

 Marshall's description are here reproduced in his own 

 words. 



General Shape of the Cerebrum. " When viewed 

 from above, the Bushwoman's Cerebrum, like her 

 cranium, presents a long and narrow ovoid form. The 

 line of greatest width corresponds with the parietal emi- 

 nences, and is placed rather far back, viz., at two-thirds 

 of the total length of the Cerebrum from its anterior 

 border, so that one-third only is behind those eminences. 

 From this prominent parietal region the Cerebrum 

 slopes or falls away in all directions very suddenly back- 

 wards and rather so forwards as far as the entrance of the 

 Sylvian fissure, where, like the foetal brain, it appears 

 remarkably constricted, and then widens again a little at 

 the outer angles of the frontal region, which is neverthe- 

 less decidedly narrow. The left hemisphere, as seen from 

 above, is *2 of an inch longer than the right, the increase 

 being almost entirely behind. This relative greater 



* "Phil. Trans." 1864, p. 501. 



