. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. 542 THE DESCENT OF MAM. [part VL In the wart-hog {Phacochoerus cethiopiais, fig. 67) the tusks in the upper jaw of the male curve upward during the prime of hfe, and from being pointed serve as formidable weapons. The tusks in the lower jaw are sharper than those in the upper, but from their shortness it seems hardly possible that they can be used as weapons of attack. They must, however, greatly strengthen those in the upper jaw, from being ground .so as to fit closely against their b
. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. 542 THE DESCENT OF MAM. [part VL In the wart-hog {Phacochoerus cethiopiais, fig. 67) the tusks in the upper jaw of the male curve upward during the prime of hfe, and from being pointed serve as formidable weapons. The tusks in the lower jaw are sharper than those in the upper, but from their shortness it seems hardly possible that they can be used as weapons of attack. They must, however, greatly strengthen those in the upper jaw, from being ground .so as to fit closely against their bases. Neither the upper nor the lower tusks appear to have been specially modified to act as guards, though no doubt they are to a certain extent used for this pur- pose. But the wart-hog is not destitute of other special means. Fig. 67.—Head of female Ethiopian Wart-hog, from ** Proc. Zool. Soc.* 1869, showing tb« esMTie characters as the male, though on a reduced scale.— When the engraving was first made, I was under the impression that it represented the male. of protection, for it has, on each side of the face, beneath the eyes, a rather stiff, yet flexible, cartilaginous, oblong pad (fig. 67). which projects two or three inches outward; and it ap- peared to Mr. Bartlett and myself, when viewing the living animal, that these pads, when struck from beneath by the tusks of an opponent, would be turned upward, and would thus ad- mirably protect the somewhat prominent eyes. I may add, on the authority of Mr. Bartlett, that these boars when fighting stand directly face to face. Lastly, the African river-hog {Fotomochoerus penicillatus) has a hard cartilaginous knob on each side of the face beneath the eyes, which answers to the flexible pad of the wart-hog ; it has also two bony prominences on the upper jaw above the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of
Size: 2053px × 1217px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
