. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Fig. 22. Left-hand fignre, male of Onitis furcifer, viewed laterally. Right-hand figure, female, a. Rudiment of cephalic horn. b. Truce of thoracic horn or crest. furcifer, as well as on the head of the females of two or three allied species, is a rudimentary representative of the cephalic horn, which is common to the males of so many Lameilicorn beetles, as in Phanseus (fig. 18). The old belief that rudiments have been created to complete the scheme of nature is here so far from hold
. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Fig. 22. Left-hand fignre, male of Onitis furcifer, viewed laterally. Right-hand figure, female, a. Rudiment of cephalic horn. b. Truce of thoracic horn or crest. furcifer, as well as on the head of the females of two or three allied species, is a rudimentary representative of the cephalic horn, which is common to the males of so many Lameilicorn beetles, as in Phanseus (fig. 18). The old belief that rudiments have been created to complete the scheme of nature is here so far from holding good, that we have a complete inversion of the ordinary state of things in the family. We may reasonably suspect that the males originally bore horns and transferred them to the females in a rudimentary condition, as in so many othej* Lamellicorns. Why the males subsequently lost their horns, we know not; but this may have been caused through the principle of compensation, owing to the development of the large horns and projections on the lower surface; and as these are confined to the males, the rudiments of the upper horns on the females would not have been thus 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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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
