. The elements of experimental embryology. Embryology, Experimental; Embryology. 374 THE FURTHER DIFFERENTIATION OF THE hemispheres is now determined to evaginate to form vesicles,^ and the eye-cup, with its stalk, retina, and tapetum, becomes quahta- tively and quantitatively determined. In the remainder of the neural tube, centres of differentiation of neurons from the neuro-epithelial cells, and of their greater or lesser degree of proliferation, are deter- mined at certain definite places.^ The main lines of the regional determination of the nervous system are thus completed when the neura
. The elements of experimental embryology. Embryology, Experimental; Embryology. 374 THE FURTHER DIFFERENTIATION OF THE hemispheres is now determined to evaginate to form vesicles,^ and the eye-cup, with its stalk, retina, and tapetum, becomes quahta- tively and quantitatively determined. In the remainder of the neural tube, centres of differentiation of neurons from the neuro-epithelial cells, and of their greater or lesser degree of proliferation, are deter- mined at certain definite places.^ The main lines of the regional determination of the nervous system are thus completed when the neural folds have fused with one another to give rise to the neural tube, and the optic cups have been 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 Huxley, Julian, 1887-1975; De Beer, Gavin, Sir, 1899-1972. New York [Hafner Pub. Co. ]
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