g THE DESCENT OF MAN. 



this state; and lie gives a laughable account of their behav- 

 ior and strange grimaces. On the following morning they 

 were very cross and dismal; they held their aching heads 

 with both hands, and wore a most pitiable expression; when 

 beer or wine was offered them, they turned away with dis- 

 gust, but relished the juice of lemons.* An American 

 monkey, an Ateles, after getting drunk on brandy, would 

 never touch it again, and thus was wiser than many men. 

 These trifling facts prove how similar the nerves of taste 

 must be in monkeys and man, and how similarly their whole 

 nervous system is affected. 



Man is infested with internal parasites, sometimes causing 

 fatal effects; and is plagued by external parasites, all of 

 which belong to the same genera or families as those infest- 

 ing other mammals, and in the case of scabies to the same 

 species, t Man is subject, like other mammals, birds, and 

 even insects, J to that mysterious law, which causes certain 

 normal processes, such as gestation, as well as the matura- 

 tion and duration of various diseases, to follow lunar periods. 

 His wounds are repaired by the same process of healing; 

 and the stumps left after the amputation of his limbs, es- 

 pecially during an early embryonic period, occasionally 

 possess some power of regeneration, as in the lowest 

 animals. 



The whole process of that most important function, the 

 reproduction of the species, is strikingly the same in all 

 mammals, from the first act of courtship by the male, || to 



*Brelim, " Thierleben," B. i, 1864, s. 75, 86. On the Ateles, s. 

 105. For other analogous statements, see s. 25, 107. 



f Dr. W. Lauder Lindsay, "Edinburgh Veterinary Review," July, 

 1858, p. 13. 



\ With respect to insects see Dr. Laycock " On a General Law of 

 Vital Periodicity," "British Association," 1842. Dr. Macculloch, 

 " Silliman's North American Journal of Science," vol. xvii, p. 305, 

 has seen a dog suffering from tertian ague. Hereafter I shall return 

 to this subject. 



1 have given the evidence on this head in ray "Variation of 

 Animals and Plants under Domestication," vol. ii, p. 15, and more 

 could be added. 



I Mares e diversis generibus Quadrumanorum sine dubio dignos- 

 cunt feminas humauas a maribus. Primum, credo, odoratu, postea 

 aspectu. Mr. Youatt, qui diu in Hortis Zoologicis (Bestiariis) medi- 

 cus animalium erat, vir in rebus observandis cautus et sagax, hoc 

 mihi certissime probavit, et curatores ejusdem loci et alii e ministris 

 confirmaverunt. Sir Andrew Smith et Brehm notabant idem in Cyno- 



