. Comparative anatomy. Anatomy, Comparative. DORSAL SAC—&^ SUPERIOR HABENULAR/ COMMISSURE POSTER IC COMMISSURE D. MAMMAL MIDBRAIN C REPTILE Fig. 488.—Parietal and pineal organs of vertebrates as seen in median longitudinal section. A, Cyclostome; B, Anuran; C, Reptile; D, Mammal. Both parietal and pineal organs have served as median eyes. In amphibia it is the pineal organ, in reptiles the parietal organ. In man and mammals the pineal organ becomes a gland of doubtful function. (Redrawn from Oppel, after Studnicka.) organs is suggested by the fact that in geotria, a cyclostome, each has a
. Comparative anatomy. Anatomy, Comparative. DORSAL SAC—&^ SUPERIOR HABENULAR/ COMMISSURE POSTER IC COMMISSURE D. MAMMAL MIDBRAIN C REPTILE Fig. 488.—Parietal and pineal organs of vertebrates as seen in median longitudinal section. A, Cyclostome; B, Anuran; C, Reptile; D, Mammal. Both parietal and pineal organs have served as median eyes. In amphibia it is the pineal organ, in reptiles the parietal organ. In man and mammals the pineal organ becomes a gland of doubtful function. (Redrawn from Oppel, after Studnicka.) organs is suggested by the fact that in geotria, a cyclostome, each has a lateral position in relation to the other; and the parietal organ has nervous. Fig. 489.—Diagrammatic longitudinal section of brain, ac, anterior commissure in lamina terminalis; aq, aqueduct; c, cerebral hemisphere; cb, cerebellum; cp, chorioid plexus; cs, corpus striatum; cv, cerebral ventricle; h, hypophysis; he, habenular com- missure; i, infundibulum; ip, inferior chorioid plexus; m, mesencephalon; ml, myelen- cephalon; p, pinealis; pa, paraphysis; pc, posterior commissure; pe, parietal eye; v, anterior medullary velum; vl, velum transversum with aberrant commissure; III and IV, third and fourth ventricles. (From Kingsley's "Comparative Anatomy of ;) connexion with the left habenular ganglion, while the pineal organ is con- nected with the right habenular ganglion; and also by the fact that the anlagen of the two in the embryos of fishes, amphibia, and reptiles lie in. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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