. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings. 240 SEXUAL SELECTION : MAMMALS. (Taut II. Bartlett informs mc that when two of these animals pre- pare for battle, they kneel down, with their heads between their front legs, and in this attitude the horns stand near- ly parallel and close to the ground, with the points di- rected forward and a little upward. The combatants then gradually approach each other and endeavor to get the upturned points under each other's bodies; if one
. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings. 240 SEXUAL SELECTION : MAMMALS. (Taut II. Bartlett informs mc that when two of these animals pre- pare for battle, they kneel down, with their heads between their front legs, and in this attitude the horns stand near- ly parallel and close to the ground, with the points di- rected forward and a little upward. The combatants then gradually approach each other and endeavor to get the upturned points under each other's bodies; if one suc- ceeds in doing this he suddenly springs up, throwing up. Fia. 61.—Oryx leucoiyx, male (from the Knowsley Menagerie). his head at the same time, and can thus wound or per- haps even transfix his antagonist. Both animals always kneel down so as to guard as far as possible against this manoeuvre. It has been recorded that one of these ante- lopes has used his horns with effect even against a lion; yet, from being forced to place his head between the fore- legs in order to bring the points of the horns forward, he would generally be under a great disadvantage when at- tacked by any other It is, therefore, not probable that the horns have been modified into their present great length and peculiar position, as a protection against beasts of prey. We can, however, see that as soon as. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York: D. Appleton and Company
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