Abstract
THE article in NATURE by Moy–Thomas1 and Westell's comments2 discuss the interesting relation existing, in fish, between certain structures of ectodermal origin and certain dermal bones. It seems appropriate to report briefly upon a similar relation which I have recently studied in the embryonic chick. A more complete account will be published elsewhere. It is well known that the fowl has fourteen dermal bones in its sclerotic, forming a ring round the pupil, and that the same number of epidermal papillæ develop in the conjunctiva at about seven days of incubation but disappear before hatching. Nussbaum3 and Dabelow4 both studied the papillæ, but as their descriptions are in several respects unsatisfactory, I have examined these structures, and especially their relation to the dermal bones, afresh.
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References
NATURE, 147, 681 (1941).
NATURE, 148, 168 (1941).
Arch. mikr. Anat., 57, 676 (1901).
Z. Morph. u. Anthrop., 26, 305 (1927).
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MURRAY, P. Epidermal Papillæ and Dermal Bones of the Chick Sclerotic. Nature 148, 471 (1941). https://doi.org/10.1038/148471a0
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DOI: https://doi.org/10.1038/148471a0
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