. A manual of zoology. Zoology. v-sr. Fig. 525. Fig. 526. Fig. 525.—Diagram of a vertebrate brain (from Wiedersiieim). Aq, aqueduct; Cc, central canal; Fil, foramen of ifonro (connection of lateral ventricles with each other and with the third); -ffi?, cerebellum; IIH, corpora bigemina (optic lobes); NH, medulla oblongata; R, spinal cord; SV, lateral ventricles; , cerebrum; ZH, optic thalami ('twixt brain); ///, IV, third and fourth ventricles. P'lG. 526.—Scheme of brain in sagittal section, c, cerebrum; ch, cerebellum; cc^ canal of spinal cord; di, notochord; cs, corpus striatum; /^, hypo
. A manual of zoology. Zoology. v-sr. Fig. 525. Fig. 526. Fig. 525.—Diagram of a vertebrate brain (from Wiedersiieim). Aq, aqueduct; Cc, central canal; Fil, foramen of ifonro (connection of lateral ventricles with each other and with the third); -ffi?, cerebellum; IIH, corpora bigemina (optic lobes); NH, medulla oblongata; R, spinal cord; SV, lateral ventricles; , cerebrum; ZH, optic thalami ('twixt brain); ///, IV, third and fourth ventricles. P'lG. 526.—Scheme of brain in sagittal section, c, cerebrum; ch, cerebellum; cc^ canal of spinal cord; di, notochord; cs, corpus striatum; /^, hypophysis; i, infundibulum; m, medullary region; o, optic chiasma; 0/, olfactory lobe; ol, optic lobes; p, parietal eye. are called the pallium, while in the floor of each hemisphere is an enlarge- ment, the corpus striatum (cs). The spaces in the hemispheres are the first and second ventricles (5F). From the front of each hemisphere arises a distinct region, the olfactory lobe or rhinencephalon {of), which gives origin to the olfactory nerve. Sincfe the organ of smell is frequently at some distance from the brain, the olfactory nerve must elongate, as in Amphibia (fig. 568), or the olfactory lobe must lengthen, as in many Elasmobranchs (fig. 549). In the latter case the swollen end of the lobe, called the hulbus olfactorius, is close to the olfactory epithelium and is connected with the brain by a long stalk, the tractus. Both, as parts of the brain, must be distinguished from the olfactory nerve. Only the lateral walls of the second vesicle become thickened, produc- ing the optic thalami or diencephalon, directly adjoining the corpora. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
