. Text-book of embryology. Embryology. eel. Fig. 67.—Illustrating the mode of origin of the spinal ganglia. A, fowl embryo with four mesoderm segments (after Neumayr, 1906) ; B and C, Torpedo 4 mm. embryo (after Dohrn, 1902); ect, ectoderm ; g, rudiment of ganglion ; , spinal cord. under the general controversy as to nerve-development and need not be specially discussed. Cranial Nerves.—The development of the cranial nerves has been investigated by many workers and an immense amount of detailed observation has been accumulated. There is however great discrepancy in detail be
. Text-book of embryology. Embryology. eel. Fig. 67.—Illustrating the mode of origin of the spinal ganglia. A, fowl embryo with four mesoderm segments (after Neumayr, 1906) ; B and C, Torpedo 4 mm. embryo (after Dohrn, 1902); ect, ectoderm ; g, rudiment of ganglion ; , spinal cord. under the general controversy as to nerve-development and need not be specially discussed. Cranial Nerves.—The development of the cranial nerves has been investigated by many workers and an immense amount of detailed observation has been accumulated. There is however great discrepancy in detail between the results obtained by different workers, and much of the observation seems to be perilously near the limit of probable error. Consequently the material seems hardly ripe for treatment in a text-book of a general kind and nothing of the sort will be attempted here beyond noting one or two points of particular 1 A modern account of the development of cranial nerves will be found in Neumayr (1906).. 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 MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929. London : Macmillan
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