. Comparative anatomy. Anatomy, Comparative. THE NERVOUS SYSTEM 487 Elasmobranchs. The nervous system of elasmobranchs shows some advances above that of cyclostomes. The roof or pallium of the telen- cephalon has thickened and expanded. To the corpus striatum is added an epistriatum, both connected with olfactory fibers. The telencephalon remains predominantly an olfactory center. Elongated olfactory tracts. Nasal capsule /Olfactory rrerve N. I ' / Rhinoccele Lateral ventricle " Olfactory bulb Nervus terminalis ->-- Olfactory tract- ~ Cerebral hemisphere- I ntervenlricular for. Y Epiph
. Comparative anatomy. Anatomy, Comparative. THE NERVOUS SYSTEM 487 Elasmobranchs. The nervous system of elasmobranchs shows some advances above that of cyclostomes. The roof or pallium of the telen- cephalon has thickened and expanded. To the corpus striatum is added an epistriatum, both connected with olfactory fibers. The telencephalon remains predominantly an olfactory center. Elongated olfactory tracts. Nasal capsule /Olfactory rrerve N. I ' / Rhinoccele Lateral ventricle " Olfactory bulb Nervus terminalis ->-- Olfactory tract- ~ Cerebral hemisphere- I ntervenlricular for. Y Epiphysis Optic nerve N. II ' -- - Thalamus. 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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