. Readings in evolution, genetics, and eugenics. Evolution; Heredity; Eugenics. IS6 READINGS IN EVOLUTION, GENETICS, AND EUGENICS. Fig. 30.—Foetus of an orang. Exact copy of a photograph, showing the form of ear at this early stage. (From Romanes.) resemblance to that of man (including even the occasional appear- ance of the projecting point shown in the preceding woodcut). It is evident that the folding over of the tip of such an ear, unless it is changed greatly during its further develop- ment, would give rise to a point projecting ;' The woodcut on page 157 (Fig. 31) serves st
. Readings in evolution, genetics, and eugenics. Evolution; Heredity; Eugenics. IS6 READINGS IN EVOLUTION, GENETICS, AND EUGENICS. Fig. 30.—Foetus of an orang. Exact copy of a photograph, showing the form of ear at this early stage. (From Romanes.) resemblance to that of man (including even the occasional appear- ance of the projecting point shown in the preceding woodcut). It is evident that the folding over of the tip of such an ear, unless it is changed greatly during its further develop- ment, would give rise to a point projecting ;' The woodcut on page 157 (Fig. 31) serves still further to show vestigial resemblances between the human ear and that of apes. The last two figures illustrate the general resemblance between the nor- mal ear of foetal man and the ear of an adult orangoutang. The other two figures on the lower line are intended to exhibit occasional modifica- tions of the adult human ear, which approximate simian characters somewhat more closely than does the normal type. It will be observed that in their comparatively small lobes these ears resemble those of all the apes; and that while the outer margin of one is not unlike that of the Barbary ape, the outer margin of the other follows those of the chimpanzee and orang. Of course it would be easy to select individual human ears which present either of these characters in a more pronounced degree; but these ears have been chosen as models because they present both characters in conjunction. The upper row of figures likewise shows the close similarity of hair-tracts, and the direction of growth on the part of the hair itself, in cases where the hmnan hair happens to be of an abnormally hirsute character. But this particular instance (which I do not think has been previously noticed) introduces us to the subject of hair, and hair-growth, in general. 8. Hair.—Adult man presents rudimentary hairs over most parts of the body. Wallace has sought to draw a refined distinction between this ve
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherchica, bookyear1921
