File:The descent of man, and selection in relation to sex (1871) (14782748812).jpg

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Identifier: descentofmansele02darw (find matches)
Title: The descent of man, and selection in relation to sex
Year: 1871 (1870s)
Authors: Darwin, Charles, 1809-1882
Subjects: Evolution Natural selection Heredity Human beings -- Origin Evolution
Publisher: London, J. Murray
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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he general colour of their coats ; but whetherthis change was effected through sexual or natural se-lection, or was due to the direct action of the conditionsof life, or some other unknown cause, it is impossibleto decide. An observation made by Mr. Sclater wellillustrates our ignorance of the laws which regulate the *2 The Variation of Animals and Plants under Domestication,1868, vol. i. p. 61-G4. YOL. II. X 306 SEXUAL SELECTION : MAMMALS. PartIL appearance and disappearance of stripes ; the species ofAsinus whicli inhabit tlie Asiatic continent are destituteof stripes, not having even the cross shoulder-stripe,whilst those which inhabit Africa are conspicuouslystriped, with the partial exception of A. t^niopus, whichhas only the cross shoulder-stripe and generally somefaint bars on the legs; and this species inhabits the almostintermediate region of Upper Egypt and Abyssinia.*^ Quadrumana.—Before we conclude, it will be advis-able to add a few remarks to those already given on the
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^ v^ \\\i^. 70. lleaii of Senmopithfcus rubicundus. This and the followir/g figures (fromProf. Oervais) are given to shew the odd arrangement and development ot the hair onthe head. <3 Proc. Zool. Soc 1862, p. 164. See, also, Dr. Hartmanu, Ann.d. Landw. Bd. xliii. s. 222. Chap. XYIII. QUADKUMANA. 307 ornamental characters of monkeys. In most of thespecies the sexes resemble each other in colour, butin some, as we have seen, the males differ from thefemales, especially in the colour of the naked parts ofthe skin, in the development of the beard, whiskers,and mane. Many species are coloured either in so ex-

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  • bookid:descentofmansele02darw
  • bookyear:1871
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Darwin__Charles__1809_1882
  • booksubject:Evolution
  • booksubject:Natural_selection
  • booksubject:Heredity
  • booksubject:Human_beings____Origin
  • bookpublisher:London__J__Murray
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:317
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
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30 July 2014

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