. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. AMPHIBIAJ^R 395 winter. Mr. St. George Mivart informs me that it i« not furnished with muscles^ and therefore cannot be used for locomotion. As during the season of courtship it becomes edged with bright colors, there can hardly be a doubt that it is a masculine ornament. In many species the body pre- sents strongly contrasted, though lurid tints, and these become more vivid during the breeding-season. The male,
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. AMPHIBIAJ^R 395 winter. Mr. St. George Mivart informs me that it i« not furnished with muscles^ and therefore cannot be used for locomotion. As during the season of courtship it becomes edged with bright colors, there can hardly be a doubt that it is a masculine ornament. In many species the body pre- sents strongly contrasted, though lurid tints, and these become more vivid during the breeding-season. The male, for instance, of our common little newt [Tritojipunctatiis) is ^^brownish-gray above, passing into yellow beneath, which in the spring becomes a rich bright orange, marked everywhere with round dark spots. ^^ The edge of the crest. 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 : A. L. Burt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
