64 C. W. M. Poynter 



Mesial and Inferior Surfaces 



The mesial surface is much simpler than the opposite side. 

 The sulcus rostraUs is represented by a single furrow near the 

 inferior margin of the frontal lobe. 



The sulcus cinguli is a continuous sulcus, not so tortuous and 

 branched as on the left, a completely developed accessory pars 

 anterior is present on the callosal gyrus. 



The pattern of the fissures of the praecuneus are similar to 

 that of the opposite side. 



The cuneus is slightly larger than on the left and the arrange- 

 ment of sulci is the same except that here there is a more distinct 

 incisura parieto-occipitalis and the gyrus cuneo-lingualis is better 

 developed although submerged. \\'e find, as on the other side, a 

 communication between the fissura calcarina and the fissura 

 hippocampi. 



The subcalcarinc group of sulci are complex and are confluent 

 with the fissura collateralis. The fissura coUatcralis is represented 

 by two segments, the anterior connected with the segment of the 

 tempero-polare (Sergi) region. 



The sulcus temporalis inferior is represented by two segments, 

 it is continent with the fissura collateralis. 



The sulci orhitalcs are arranged in an " H " form, they cannot 

 be compared with the opposite side for there the cortex was 

 destroyed by the bullet. 



It is impossible to give a description of the insulae because they 

 are so broken up by the bullet wound. 



It is very clear that this brain dilYers in many particulars from 

 that of Case I. The fissures have a greater tendency to run into 

 each other and present a great many more secondary branches, 

 all of which makes the surface much more complex in appear- 

 ance. At one time this richness of furrows would have been 

 interpreted as an indication of high mental ability. The flat sur- 

 face of the convolutions gives the appearance of inferiority in 

 development, but the fissures average as deep as those in Case I. 

 The unusual confluence of the fissura calcarina and the fissura 

 hippocampi can have little significance, for the same variation 

 appears partially or completely in over 20 per cent, of the brains 



408 



