[371] Dr. Gray, ‘Gleanings from the Menagerie of Knowsley,’ p. 64. Mr. Blyth, in speaking (‘Land and Water,’ 1869, p. 42) of the hog-deer of Ceylon, says it is more brightly spotted with white than the common hog-deer, at the season when it renews its horns. [372] Falconer and Cautley, ‘Proc. Geolog. Soc.’ 1843; and Falconer’s ‘Pal. Memoirs,’ vol. i. p. 196. [373] ‘The Variation of Animals and Plants under Domestication,’ 1868, vol. i. p. 61-64. [374] ‘Proc. Zool. Soc.’ 1862, p. 164. See, also, Dr. Hartmann, ‘Ann. d. Landw.’ Bd. xliii. s. 222. [375] I observed this fact in the Zoological Gardens; and numerous cases may be seen in the coloured plates in Geoffroy St.-Hilaire and F. Cuvier, ‘Hist. Nat. des Mammifères,’ tom. i. 1824. [376] Bates, ‘The Naturalist on the Amazons,’ 1863, vol. ii. p. 310. [377] I have seen most of the above-named monkeys in the Zoological Society’s Gardens. The description of the _Semnopithecus nemæus_ is taken from Mr. W. C. Martin’s ‘Nat. Hist. of Mammalia,’ 1841, p. 460; see also p. 475, 523. [378] Schaaffhausen, translation in ‘Anthropological Review,’ Oct. 1868, p. 419, 420, 427. [379] Ecker, translation in ‘Anthropological Review,’ Oct. 1868, p. 351-356. The comparison of the form of the skull in men and women has been followed out with much care by Welcker. [380] Ecker and Welcker, ibid. p. 352, 355; Vogt, ‘Lectures on Man,’ Eng. translat. p. 81. [381] Schaaffhausen, ‘Anthropolog. Review,’ ibid. p. 429. [382] Pruner-Bey, on negro infants, as quoted by Vogt, ‘Lectures on Man,’ Eng. translat. 1864, p. 189: for further facts on negro infants, as quoted from Winterbottom and Camper, see Lawrence, ‘Lectures on Physiology,’ &c. 1822, p. 451. For the infants of the Guaranys, see Rengger, ‘Säugethiere,’ &c. s. 3. See also Godron, ‘De l’Espèce,’ tom. ii. 1859, p. 253. For the Australians, Waitz, ‘Introduct. to Anthropology,’ Eng. translat. 1863, p. 99. [383] Rengger, ‘Säugethiere,’ &c. 1830, s. 49. [384] As in _Macacus cynomolgus_ (Desmarest, ‘Mammalogie,’ p. 65) and in _Hylobates agilis_ (Geoffroy St.-Hilaire and F. Cuvier, ‘Hist. Nat. des Mamm.’ 1824, tom. i. p. 2). [385] ‘Anthropological Review,’ Oct. 1868, p. 353. [386] Mr. Blyth informs me that he has never seen more than one instance of the beard, whiskers, &c., in a monkey becoming white with old age, as is so commonly the case with us. This, however, occurred in an aged and confined _Macacus cynomolgus_, whose moustaches were “remarkably long and human-like.” Altogether this old monkey presented a ludicrous resemblance to one of the reigning monarchs of Europe, after whom he was universally nick-named. In certain races of man the hair on the head hardly ever becomes grey; thus Mr. D. Forbes has never seen, as he informs me, an instance with the Aymaras and Quechuas of S. America.