. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 274 THE DEVELOPMENT OF THE CHICK Nussbaum, Szily, and Lewis to arise from epithelial buds of the pupillary margin and the adjacent portion of the pigment layer of the iris. The marginal buds (Fig. 160) begin to form during the seventh day, the more peripheral ones somewhat later; the former are less numerous and larger than the latter. The observations are well supported, and appear to leave no doubt that the specificity of the ectoderm cells of the iris is not fixed. According to Lewis the wanderi
. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 274 THE DEVELOPMENT OF THE CHICK Nussbaum, Szily, and Lewis to arise from epithelial buds of the pupillary margin and the adjacent portion of the pigment layer of the iris. The marginal buds (Fig. 160) begin to form during the seventh day, the more peripheral ones somewhat later; the former are less numerous and larger than the latter. The observations are well supported, and appear to leave no doubt that the specificity of the ectoderm cells of the iris is not fixed. According to Lewis the wandering pigmented cells of the ante- rior portion, at least, of the choroid also arise from the pigment layer of the optic cup. The ciliary processes begin to form from the ciliary region of the lenticular zone on the eighth day (Fig. 159); the epithelium Sfih. 5/>M. 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 Lillie, Frank Rattray, 1870-1947. New York : Henry Holt
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Keywords: ., bookauthorlilliefrankrat, bookcentury1900, booksubjectembryology
