The descent of man, and selection in relation to sex (1871) (20866761175)

Title: The descent of man, and selection in relation to sex
Identifier: descentofmansel02darw (find matches)
Year: 1871 (1870s)
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: Princeton Theological Seminary Library
Digitizing Sponsor: Princeton Theological Seminary Library



Text Appearing Before Image:
253 SEXUAL SECECTION: MAMMALS. (Part IL little latcrnlly, increase so much in length during old age, and curve so much upward, that they can be used as a means of attack. Nevertheless an old boar is not so dan- gerous to man as one at the age of six or seven years."* In the full-grown male Babirusa pig of Celebes (Fig. 64), the lower tusks are formidable weapons, like those of
Text Appearing After Image:
Fig. 64.—Skull ol the babirtiga Pig (from Wallace's ' Malay Archipelago'). the European boar in the prime of life, while the upper tusks are so long and have their points so much curled inward, sometimes even touching the forehead, that they are utterly useless as weapons of attack. They more near- ly resemble horns than teeth, and are so manifestly useless as teeth that the animal was formerly supposed to rest his head by hooking them on to a branch. Their convex « Brehm, ' Thierleben,' B. ii. s. "729, "732.