. The development of the chick; an introduction to embryology. Birds -- Embryology. 148 THE DEVELOPMENT OF THE CHICK. Fig. 83. — Five stages in the history of the neuromeres of the brain of the chick. (After Hill.) All figures drawn from preparations of the embryonic brain dissected out of the embryo. A. Neural groove in an embryo with 4 somites. Right profile view, x 44. B. Brain of a 7 s embryo, 26 hours old. Dorsal view; the three anterior neuromeres are practically obliterated, x 44. C. Brain of 14 s embryo. Dorsal view, x 44. The neuromeres have now disappeared in the mid-brain region. D.
. The development of the chick; an introduction to embryology. Birds -- Embryology. 148 THE DEVELOPMENT OF THE CHICK. Fig. 83. — Five stages in the history of the neuromeres of the brain of the chick. (After Hill.) All figures drawn from preparations of the embryonic brain dissected out of the embryo. A. Neural groove in an embryo with 4 somites. Right profile view, x 44. B. Brain of a 7 s embryo, 26 hours old. Dorsal view; the three anterior neuromeres are practically obliterated, x 44. C. Brain of 14 s embryo. Dorsal view, x 44. The neuromeres have now disappeared in the mid-brain region. D. Right side of the brain of a chick embryo, 47 hours old. x 44. E. Right side of the brain of an embryo, 80 hours old. x 17. 1-11, Neuromeres 1 to 11. Ill, V, VH, interneuromeric grooves. A'f., Root of acustico-facialis (seventh and eighth cranial nerves), au. vs., Audi- tory pit. ep., Epiphysis, r., Groove between the tel- and diencephalon. s., Groove between the par- and synencephalon. Tr., Root 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 Lillie, Frank Rattray, 1870-1947. New York, Holt
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