| OCR Text |
Show 598 MR. F. E. BEDDARD ON THE [Dec. 6, occupies the middle of the length of the hemisphere and runs from above downwards ; on the left side of the brain this furrow gives off a faint branch which seems to be the Sylvian fissure-otherwise hardly marked. O n the inferior surface of the brain the rhinal fissure is seen to be Fig. 1. Brain of Capromys pilorides. A, from above : B, from the side. perfectly continuous and quite well marked from end to end. As already mentioned, I found the greatest difficulty in discovering any traces of the Sylvian fissure excepting in the lateral region of the hemispheres, where it is present. Myopotamus coypu.-Tot&\ length 39 mm., breadth 28 mm., height 14 m m. The cerebral hemispheres are nearly but not quite smooth ; there being indications of furrows which are more strongly marked in other genera. Tbe extreme length of each hemisphere is 28 m m. They diverge posteriorly so as to display a portion of the corpora quadrigemina-both nates and testes; the latter are, however partly concealed by a projection of the cerebellum. Anteriorly the two hemispheres become very narrow and diverge in a marked way from each other ; passing back, the hemispheres rapidly increase in |
