The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . erebri has two lateral diverticulaknown as sacci vasculosi. Ganglia geniculata are found for the firsttime in connexion with the optic tracts in the lower part of thethalamus. The olfactory lobes (fig. 17, Olf. Bulb) are very large andoften separated by long stalks from the cerebral hemispheres,which are comparatively much larger than those of the Cyclo^stomata; their roof or pallium is nervous, but devoid of cortical OLF. eu^s anterior pineal organ or paraphysis is large (Saunders, Ann. andMag. Na
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . erebri has two lateral diverticulaknown as sacci vasculosi. Ganglia geniculata are found for the firsttime in connexion with the optic tracts in the lower part of thethalamus. The olfactory lobes (fig. 17, Olf. Bulb) are very large andoften separated by long stalks from the cerebral hemispheres,which are comparatively much larger than those of the Cyclo^stomata; their roof or pallium is nervous, but devoid of cortical OLF. eu^s anterior pineal organ or paraphysis is large (Saunders, Ann. andMag. Nat. Hist. set. 6, vol. iii., 1889, p. 157; Burkhardt, Central-nervensystem v. Protopterus, Berlin, .1892). In the Amphibia the brain is of a low type, the most markedadvances on that of the fish being that the anterior commissure isdivided into a dorsal and ventral part, of which the ventral is thetrue anterior commissure of higher vertebrates, while the dorsal isa hippocampal commissure and coincides in its appearance withthe presence of a small mass of cells in the outer layer of the median. From Cat. England. Fig. OPT. CHI, 18.—Section of Brain of Turtle (Chelone).
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
