File:The descent of man, and selection in relation to sex (1874) (20867474555).jpg

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Title: The descent of man, and selection in relation to sex
Identifier: descentofmansele1874darw (find matches)
Year: 1874 (1870s)
Authors: Darwin, Charles, 1809-1882
Subjects: Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences
Publisher: New York : A. L. Burt
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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REPTILES. 405 in C. Mfurciis, we can hardly doubt that they serve the same general purpose in the economy of these two animals. The first conjecture^ which will occur to every one, is that they are used by the maJes for fighting together; and as these animals are very quarrelsome,* this is probably a cor rect view. Mr. T. W. Wood also informs me that he once watched two individuals of C, inimilus fighting violently on the branch of a tree; they flung their heads about and tried to bite each other; they then rested for a time and afterward continued their battle.
Text Appearing After Image:
Fig. 36. Chamaeleo Owenii. Upper figure, male; lower figure, female. I ^ With many lizards the sexes differ slightly in color, the tints and stripes of the males being brighter and more dis= inctly defined than in the females. This, for instance, is the case with the above Cophotis and with the Acantho- dadylus capensis of S. Africa. In a Cordylus of the latter country, the male is either much redder or greener than the female. In the Indian Calotes nigrilabris there is a still greater difference; the lips also of the male are black, while those of the female are green. In our common little viviparous lizard (Zootoca vivipara) the under side of the body and base of the tail in the male are bright orange. fS. Dr. Bucholz, Monatsbericht K. Preuss. Akad.," Jan., 1874, p

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Flickr tags
InfoField
  • bookid:descentofmansele1874darw
  • bookyear:1874
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Darwin_Charles_1809_1882
  • booksubject:Evolution
  • booksubject:Natural_selection
  • booksubject:Heredity
  • booksubject:Human_beings
  • booksubject:Sexual_selection_in_animals
  • booksubject:Sexual_dimorphism_Animals_
  • booksubject:Sex_differences
  • bookpublisher:New_York_A_L_Burt
  • bookcontributor:Harold_B_Lee_Library
  • booksponsor:Brigham_Young_University
  • bookleafnumber:445
  • bookcollection:americana
  • BHL Collection
Flickr posted date
InfoField
25 August 2015

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