. The biology of twins (mammals). Twins. 158 THE BIOLOGY OF TWINS demonstrate monozygotic origin, but lack of identity does not disprove the possibility of monozygotic origin. Wilder has illustrated certain very good cases of identity by means of photographs of palm- and sole-prints (see Fig. 52). The heavy lines are the lines of interpretation. Fig. 53.—Photograph (from Wilder) of the left (above) and right (below) palm-prints of a set of triplets. Note the close identity of the males, which are evidently "identicals," and the unlikeness of these to the female triplet on the right,
. The biology of twins (mammals). Twins. 158 THE BIOLOGY OF TWINS demonstrate monozygotic origin, but lack of identity does not disprove the possibility of monozygotic origin. Wilder has illustrated certain very good cases of identity by means of photographs of palm- and sole-prints (see Fig. 52). The heavy lines are the lines of interpretation. Fig. 53.—Photograph (from Wilder) of the left (above) and right (below) palm-prints of a set of triplets. Note the close identity of the males, which are evidently "identicals," and the unlikeness of these to the female triplet on the right, which has evidently come from a separate egg. and serve merely to emphasize a real, fundamental identity. Another very interesting case is that of triplets (two boys and one girl, Fig. 53) and illustrates very well the difference between ordinary ''fraternal" resemblance and true identity. The palm-prints of the girl are no more like those of the two boys than is usually the case. 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 Newman, Horatio Hackett, b. 1875. Chicago, Ill. , University of Chicago press
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