. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. - Medulla Infundibulum Corpus Striatum-; Olfactory Lobe- ** Hypophysis Fig. 649. Sagittal section diagram of the brain of an amphibian. (After Edinger.) The presence in certain fossil fishes, for example Titanichthys, of a pair of foramina located side by side in the skull directly above this region in the brain, also seems to point to the originally paired relation of these organs. Apparently the tandem-like position of the pineal and parietal bodies in c
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. - Medulla Infundibulum Corpus Striatum-; Olfactory Lobe- ** Hypophysis Fig. 649. Sagittal section diagram of the brain of an amphibian. (After Edinger.) The presence in certain fossil fishes, for example Titanichthys, of a pair of foramina located side by side in the skull directly above this region in the brain, also seems to point to the originally paired relation of these organs. Apparently the tandem-like position of the pineal and parietal bodies in cyclostomes is the result of a secondary displacement of the former side-by- side arrangement. The histological structure of the epiphysis, or pineal body, as well as its access to light through a foramen in the dorsal region of the skull, seems to indicate that it is, in cyclostomes at least, a photoreceptive organ by means of which light and darkness are distinguished. Parietal Lobex -Cerebellum Paraphysis JH^^^^r=rM^M ^\. I ftfffcer-Vdum In Pallium *>~^^0^*~ ^3/// Velum Interpositum of-^^;-- Third Ventricle ^f=^r£-L _ ... ^£-3fe--i-r^hr--j555oBk ^ V _JJlllllfiy Medulla Corpus Striatum-£=-r-^-_-_r:r:r. Olfactory Lobe-ISH^'^ "^^^y^T^^^^^^^^r-lnfundibulum Optic Chiasma' ^-Hypophysis Fig. 650. Sagittal section diagram of the brain of a reptile. (After Edinger.). 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte
