Archive image from page 299 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel02darw Year: 1871 286 SEXUAL SELECriON : MAMMALS. [Pabt IL the throat, tlie white marks on tlie fetlocks, and tlie round hhick s{)ot8 on the ears, are all more distmct in the male of the Portax. picta than iu the female—when we see that the colors are more vivid, that the narrow white lines on the flank and the broad white bar on tlie shoulder are Fio. 69.—Damalis pygarga, male (from the Knowsley Menajrerie). more distinct in the male Oreas Derby arms than in the fe-
Archive image from page 299 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel02darw Year: 1871 286 SEXUAL SELECriON : MAMMALS. [Pabt IL the throat, tlie white marks on tlie fetlocks, and tlie round hhick s{)ot8 on the ears, are all more distmct in the male of the Portax. picta than iu the female—when we see that the colors are more vivid, that the narrow white lines on the flank and the broad white bar on tlie shoulder are Fio. 69.—Damalis pygarga, male (from the Knowsley Menajrerie). more distinct in the male Oreas Derby arms than in the fe- male—when we see a similar difference between the sexes of the curiously ornamented Tragelaphus scriptus (Fig, 68)—we may conclude that these colors and various marks have been at least intensified through sexual selec- tion. It is inconceivable tliat such colors and marks can be of any direct or ordinary service to those animals; and
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