The Journal of the Linnean Society of London . complicated anteriorly. Indeed, it seemsimpossible to draw any well-defined boundary between Sylvian fissure is oblique and prolonged. The Sylvian gyrusis simple, and has its anterior limb very decidedly the parietal gyrus, if it could be considered simple, must besaid to blend with the sagittal gyrus by several bridging convo-lutions. The sagittal gyrus must then be considered as verywide, and as bearing two longitudinal grooves at its middle blends, as just stated, with the parietal sulcus, and expandswidely as it a
The Journal of the Linnean Society of London . complicated anteriorly. Indeed, it seemsimpossible to draw any well-defined boundary between Sylvian fissure is oblique and prolonged. The Sylvian gyrusis simple, and has its anterior limb very decidedly the parietal gyrus, if it could be considered simple, must besaid to blend with the sagittal gyrus by several bridging convo-lutions. The sagittal gyrus must then be considered as verywide, and as bearing two longitudinal grooves at its middle blends, as just stated, with the parietal sulcus, and expandswidely as it advances forwards. Its hindmost part is verybroad, and bears a median longitudinal groove. The crucialsulcus sends forwards, on either side, a groove to define a smallUrsine lozenge. It is not joined by the calloso-marginalsulcus, a bridging convolution connecting the hippocampal andsagittal gyri behind the crucial sulcus. * See I. c. p, 145. t Eeferred to by P. Gervais, I. c. p. 144. He giyes no figure. 16 MK. ST. GEORGE MIVAUT ON THE Fig. P; So. Fig. 5.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectzoology, bookyear1865
