. The biology of twins (mammals). Twins. 54 THE BIOLOGY OF TWINS top and the common amnion at the bottom of the figure. This arrangement, doubtless, looks upside down to one famihar with previous accounts of the embryology of. Fig, 17.—Armadillo egg with quadruplet embryos attached to primitive placenta, which is a bowl-shaped area at top of figure. Note the connecting canals running downward to the original common point of origin, which is now occupied by the small common amnion. (See stage IX.) (Redrawn from Newman and Patterson.) Dasypiis, but the reversal of axis is an important feature of
. The biology of twins (mammals). Twins. 54 THE BIOLOGY OF TWINS top and the common amnion at the bottom of the figure. This arrangement, doubtless, looks upside down to one famihar with previous accounts of the embryology of. Fig, 17.—Armadillo egg with quadruplet embryos attached to primitive placenta, which is a bowl-shaped area at top of figure. Note the connecting canals running downward to the original common point of origin, which is now occupied by the small common amnion. (See stage IX.) (Redrawn from Newman and Patterson.) Dasypiis, but the reversal of axis is an important feature of the embryonic history and must be indicated just as it appears. The comparatively smooth outline of the Trager region is due to the fact that the period of. 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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