106 J- Leffingwell Hatch, 



The calloso-marginal fissure is abnormal as to extent, commencing 

 in the gyrus fornicatus at a point above the genu of the corpus callo- 

 sum, it proceeds in the usual curved direction forming a „Hogarthian 

 line of beauty", and terminates on the lateral surface in a prolon- 

 gation of 1,5 cm. The entire length of this sulcus is 10,5 cm. 



The parietooccipital is slightly curved, average in direction, and 

 just before terminating on the lateral surface becomes bifid. It does 

 not enter the hippocampal fissure at its other extremity, as in some 

 of the other brains, where the gyrus fornicatus is entirely submerged, 

 but ends below this point having been joined by the calcarine. The 

 lobulus quadratus is normal as to size and shape, being cut up with 

 deep sulci, which on confluence form an H-shaped indenture. 



The calcarine fissure is normal in size and direction bifurcating 

 at its extremity. It is confluent with the parieto-occipital. The cuneus 

 is peculiarly divided by a vertical fissure that extends over unto the 

 lateral surface for a distance of 2 cm., terminating within the superior 

 occipital convolution. This division of the cuneus makes it U-shaped 

 rather than wedge shaped. This extra lobulation which extends up 

 over the margin and unto the lateral surface is what Gratiolet calls 

 the „pli de passage". 



The lobulus lingualis is abnormally segmented by well marked 

 and good sized sulci. 



The collateral fissure 7 cm. in length is normal in position and 

 extent. The lobulus fusiformis is divided by numerous secondary fis- 

 sures which are confluent. 



The hippocampal sulcus as well as the fissure of the corpus 

 callosum are normal in direction and extent. The dentate and uncinate 

 gyri present nothing out of the norm. 



The orbital surface presents a well marked and deep fissure for 

 the olfactory lobe. In place of the triradiate fissure there is an 

 H-shaped one, a peculiarity that has been noticed in other brains of 

 a low type. 



Left Hemisphere. Outer surface. — The Sylvian fissure is longer 

 than that of the opposite side, being 8 cm. in length, a feature noted 



