. Carnegie Institution of Washington publication. . FIG. 3.—Coat pattern of ^ 1358, a son of O 973 FIG. 4.—Coat pattern of ^ 1360, a son of Q 97; (fig. i). The right cheek patch is black, (fig. i). There are cheek patches of red. the left one red. There is a left side and a right neck (ear) patch of black, patch of black, but no right side patch. No others of the typical patches are The fused rump patches are red. present. This unity may be obscured if it happens that two pigments, as black and red for example, are both present in the same patch. Neverthe- less, in such cases one can often sti
. Carnegie Institution of Washington publication. . FIG. 3.—Coat pattern of ^ 1358, a son of O 973 FIG. 4.—Coat pattern of ^ 1360, a son of Q 97; (fig. i). The right cheek patch is black, (fig. i). There are cheek patches of red. the left one red. There is a left side and a right neck (ear) patch of black, patch of black, but no right side patch. No others of the typical patches are The fused rump patches are red. present. This unity may be obscured if it happens that two pigments, as black and red for example, are both present in the same patch. Neverthe- less, in such cases one can often still identify the typical patches either by the occurrence of unpigmented areas between them, or by the occurrence of mixed pigments in one patch and of unmixed pigments in adjacent patches. At one time I thought that I had obtained an explanation of the difference in behavior of the centrifugal and centripetal types of pigmen- tation. It seemed that the centrifugal pigmentation was of dermal origin, the centripetal of epidermal origin ; but more careful examina- tion of sections of the skin indicates that both sorts of pigmentation are similar in origin, arising within cells of the 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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