. Quain's elements of anatomy . r, which istherefore denominsjted the ganglionic layer. On the other hand, in the neighbour-hood of the calcarine fissure, in the occipital lobe, large cells are very scanty, theirplaces being for the most part taken by smaller ones. Again, in many i^arts a six-laminated cortex is produced by the intercalation of a layer of small angular cellsbetween the third layer and the ganglionic layer (Lewis).* But the most remark- * For an extended account of the structure of the cerebral cortex in man and animalstLe reader is referred to a paper by Bevan-Lewis and H. Cla
. Quain's elements of anatomy . r, which istherefore denominsjted the ganglionic layer. On the other hand, in the neighbour-hood of the calcarine fissure, in the occipital lobe, large cells are very scanty, theirplaces being for the most part taken by smaller ones. Again, in many i^arts a six-laminated cortex is produced by the intercalation of a layer of small angular cellsbetween the third layer and the ganglionic layer (Lewis).* But the most remark- * For an extended account of the structure of the cerebral cortex in man and animalstLe reader is referred to a paper by Bevan-Lewis and H. Clarke in the Proceedings ofthe Royal Society, vol. xxvii., 1878; and to papers by Bevan-Lewis, in the Philo-sophical Transactions for 1880 and 1882, and in Brain, and by Betz in the , 1881. 360 THE CEREBKAL HEMISPHERES. able differences of structui-e occur at the incnrved margin of the hemisphere inthe region of the cornu ammonis or hippocampus major, and in the olfactoiylobe. These will now be specially -Section across the hippocajiptjs major, dentate fissure, dentate fasciaAND FIMBRIA (after Henle). Gh, part of the gyrus hippocampi or itncinate convolution ; Fd, fascia dentata ordentate convolution ; between them is the dentate fissure ; Fi, fimbria, composed oflongitudinal fibres here cut across ; 1, 2, medullary centre of the hippocampal gyrus pro-longed around the hippocampus, H, as the so-called alveus, into the fimbria ; 3, layer oflarge pyramidal cells; 4, stratum radiatum : 5, stratum laciniosum ; 6, superficialmedullary lamina, involuted around the dentate fissure ; **, termination of this lamina,the fibres here running longitudinally; 7, superficial neuroglia of the fascia dentata;*, stratum granulosum. Structure of the hippocampus major or cornu ammionis.—The hippocam-pus it will be remembered corresponds to the hippocampal fissuie externally ; thisfissure separating the uncinate convolution below from the fascia dentata uncinate
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