. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. GLANDS OF THE EYE. 193 in Reptiles this becomes more developed in the region of the anterior and posterior angles of the eye, and the original connecting- bridge gradually disappears : thus two glands are developed from the primitively single one, each of which becomes further diffei- entiated both histologically and physiologically. From one is formed the Harderian gland, which always lies at the anterior angle of the eye, surrounding to a greater or less extent the antero-ventral portion of th
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. GLANDS OF THE EYE. 193 in Reptiles this becomes more developed in the region of the anterior and posterior angles of the eye, and the original connecting- bridge gradually disappears : thus two glands are developed from the primitively single one, each of which becomes further diffei- entiated both histologically and physiologically. From one is formed the Harderian gland, which always lies at the anterior angle of the eye, surrounding to a greater or less extent the antero-ventral portion of the eyeball, while the other gives rise to the lacryrnal gland (Fig. 157, H, H\ Th). The latter retains throughout life. FIG. 157.—HARDEKIAN GLAND (H, H1) AND LACRYMAL GLAND (Tk) OF Ancjuis fragilis. M, muscle of jaw ; B, 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 Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, New York, Macmillan
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