318 SEXUAL selection: man. Part II. 



cannot be detected in the infantile skull.* In regard to 

 colour, the new-born negro child is reddish nut-brown, 

 which soon becomes slaty-grey ; the black colour being 

 fully developed within a year in the Sudan, but not 

 until three years in Egypt. The eyes of the negro are 

 at first blue, and the hair chesnut-brown rather than 

 black, being curled only at the ends. The children of 

 the Australians immediately after birth are yellowish- 

 brown, and become dark at a later age. Those of the 

 Guaranys of Paraguay are whitish-yellow, but they 

 acquire in the course of a few weeks the yellowish- 

 brown tint of their parents. Similar observations have 

 been made in other parts of America.^ 



1 have specified the foregoing familiar differences be- 

 tween the male and female sex in mankind, because they 

 are curiously the same as in the Quadrumana. With 

 these animals the female is mature at an earlier age than 

 the male ; at least this is certainly the case with the 

 Cehus azarse^ With most of the species the males are 

 larger and much stronger than the females, of which 

 fact the gorilla offers a well-known instance. Even in 

 so trifling a character as the greater prominence of the 

 superciliary ridge, the males of certain monkeys differ 

 from the females,^ and agree in this respect with man- 

 kind. In the gorilla and certain other monkeys, the 



* Schaaif Imusen, ' Anthropolog. Eeview,' ibid. p. 429. 



* Pruner-Bey, on negro infants, as quoted by Vogt, ' Lectures on 

 Man,' Eng. translat. 1864, p. 189 : for furtlier facts on negro infants, as 

 quoted from Winterbottom and Camper, see Lawrence, 'Lectures on 

 Pliysiology,' &c. 1822, p. 451. For the infants of the Guaranys, see 

 Rengger, ' Saugethiere,' &c. s. 3. See nlso Godron, ' De I'EsiJece,' torn, 

 ii. 1859, p. 253. For the Australians, Waitz, ' Introduct. to Anthro- 

 pology,' Eng. translat. 1863, p. 99. 



6 Rengger, ' Saugetliiere,' &c. 1830, s. 49. 



^ As in Maciicus cynomolgus (Desmarest, ' Mammalogie,* p. 65) and 

 in Hylobates agil's (Guoffroy St.-Hilaire and F. Cuvier, 'Hist. Nat. des 

 Mamm.' 1824, torn. i. p. 2). 



