. The elements of embryology. Embryology; Embryology. 138 THE THIRD DAY. [chap. much the appearance represented in the diagram Fig. 49. A section of such an eye taken along the Hne y, perpendicular to the plane of the paper, would give a figure corresponding to that of Fig. 50 A. The lens, the cavity and double walls of the secondary vesicle, and the remains of the primary cavity, would all be repre- FiG. Diagrammatic Eepresentation of the Eye of the Chick OF about the Third Day as seen when the head is viewed FROM UNDERNEATH AS A TRANSPARENT OBJECT. I the lens, V the cavity of the lens,
. The elements of embryology. Embryology; Embryology. 138 THE THIRD DAY. [chap. much the appearance represented in the diagram Fig. 49. A section of such an eye taken along the Hne y, perpendicular to the plane of the paper, would give a figure corresponding to that of Fig. 50 A. The lens, the cavity and double walls of the secondary vesicle, and the remains of the primary cavity, would all be repre- FiG. Diagrammatic Eepresentation of the Eye of the Chick OF about the Third Day as seen when the head is viewed FROM UNDERNEATH AS A TRANSPARENT OBJECT. I the lens, V the cavity of the lens, lying in the hollow of the optic cup. r the anterior, u the posterior wall of the optic cup, c the cavity of the primary optic vesicle, now nearly obliterated. By inadvertence u has been drawn thicker than r, it should have been thinner throughout. s the stalk of the optic cup with s its cavity, at a lower level than the cup itself and therefore out of focus ; the dotted line indicates the continuity of the cavity of the stalk with that of the primary vesicle. The line 2, z, through which the section shewn in Fig. 50 C is supposed to be taken, passes through the choroidal 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 Foster, M. (Michael), Sir, 1836-1907; Balfour, Francis M. (Francis Maitland), 1851-1882; Sedgwick, Adam, 1854-1913; Heape, Walter, 1855-1929. London : Macmillan and Co.
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Keywords: ., bookcentury1800, bookdecade1, booksubjectembryology, bookyear1883
