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Title: The descent of man, and selection in relation to sex
Identifier: descentofmansele000darw (find matches)
Year: 1971 (1970s)
Authors: Darwin, Charles, 1809-1882
Subjects: Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings
Publisher: New York: D. Appleton and Company
Contributing Library: Brigham Young University Hawaii, Joseph F. Smith Library
Digitizing Sponsor: Consortium of Church Libraries and Archives

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&6 SEXUAL SELECTION. (Part II. fact the vocal organs of the males are more highly de- veloped than those of the females. In some genera the males alone are provided with sacs which open into the larynx.43 For instance, in the edible frog (liana esculen- ta) " the sacs are peculiar to the males, and become, when filled with air in the act of croaking, large globular blad-
Text Appearing After Image:
Fig. 32.— Megalophrys raontana. The two left-hand figures, the male ; the two right-hand figures, the female. ders, standing out one on each side of the head, near the corners of the mouth." The croak of the male is thus rendered exceedingly powerful; while that of the female is only a slight groaning noise.44 The vocal organs differ considerably in structure in the several genera of the family; and their development in all cases may be attrib- uted to sexual selection. Reptiles. Chelonia,—Tortoises and turtles do not offer well- marked sexual differences. In some species, the tail of 43 J. Bishop, in 'Todd's Cyclop, of Anat. and Phys.' vol. iv. p. 1503. 44 Bell, ibid. pp. 112-114.

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Flickr tags
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  • bookid:descentofmansele000darw
  • bookyear:1971
  • bookdecade:1970
  • bookcentury:1900
  • bookauthor:Darwin_Charles_1809_1882
  • booksubject:Evolution_Biology_
  • booksubject:Sexual_selection_in_animals
  • booksubject:Sexual_dimorphism_Animals_
  • booksubject:Sex_differences
  • booksubject:Human_beings
  • bookpublisher:New_York_D_Appleton_and_Company
  • bookcontributor:Brigham_Young_University_Hawaii_Joseph_F_Smith_Library
  • booksponsor:Consortium_of_Church_Libraries_and_Archives
  • bookleafnumber:38
  • bookcollection:brighamyounguniversityhawaii
  • bookcollection:americana
  • BHL Collection
Flickr posted date
InfoField
25 August 2015

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