Novelty in Evolution: Restructuring the Concept

  • Muller G
  • Wagner G
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"In the frequent fits of anger to which the males especially are subject, the eftbrts of their inner feelings cause the fluids to flow more strongly towards that part of their head; in some there is hence deposited a secretion of horny matter, and in others of bony matter mixed with horny matter, which gives rise to solid protuberances: thus we have the origin of horns and antlers.

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  • G B Muller

  • G P Wagner

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