The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . —CCBEfiEL. OLf TUBER. PONS FLOC. From Cat. England. Fig. 20.—Mesial and Lateral Views of the Brain of Ornithorynchus. and back part of the ventricle, while the rudiments of the dorsalpart remain as the striae Jongitudinales on the corpus dorsal part of the original anterior commissure beco^mes thefornix, and the paraterminal area is modified to form the septumlucidum. The first appearance of the fissure of Rolando is probablyin some of the Carnivora, in which, as the sulcus cruc
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . —CCBEfiEL. OLf TUBER. PONS FLOC. From Cat. England. Fig. 20.—Mesial and Lateral Views of the Brain of Ornithorynchus. and back part of the ventricle, while the rudiments of the dorsalpart remain as the striae Jongitudinales on the corpus dorsal part of the original anterior commissure beco^mes thefornix, and the paraterminal area is modified to form the septumlucidum. The first appearance of the fissure of Rolando is probablyin some of the Carnivora, in which, as the sulcus crucialis, it formsthe posterior boundary of the ursine lozenge described by Mivart(Journ. Linn. Sac. vol. xix., 1886) (see fig. 22, Sulc. Cru.). In the SULC. ORB, OLF. BULB. . HJP. DENT. \- COMM. D SULC. ORB. From Cat. England. Fig. 22.—Dorsal and Lateral Views of the Brain of a Ratel iMellivora indica). lunatus. It is usually concealed in European brains by the overgrowthof the surrounding gyri, but it occasionally remains, though lessfrequently than in the brains of Egyptian fellaheen. Its relation tothe white stria 0/ Gennari is especially interesting, and isrecorded by Elliot Smith in the Anatomischer Anzeiger, , 1904, p. 436. The rhinal fissure, which is so charac-teristic a feature of the lower mammals, almost disappearsin Man, and is only represented by the incisura temporalis(see fig. II, ). The hippocampal fissure persists with littlemodification all through the mammalian class. The cal-carine fissure remains with many modifications from themarsupials to man, and in view of the famous controversy of1864, in iWhich Owen, Huxley and the then bishop ofOxford took part, it is interesting to note that its hip-pocampu
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