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lies directly behind the lobiis anterior, and continues without 

 interruption from the right to the left, whilst incomplete furrows, 

 not starting from the median line, do not occur in it. Moreover 

 the convolutions forming the crus primum, lie adjacent to it and 

 originate in it. 



This convolution sub 6 thus forming the lobus simplex on the 

 surface, does not continue very far on the more lateral part, as 

 may be seen in the figure. It is therefore little developed. 



Now if we follow to the right the course of the convolution 

 sub 4 fig. II, about which it is not yet decided whether it 

 belongs to the anterior or to the posterior lobe, we find that this 

 convolution loses itself in the cavity sub 1. It may be said there- 

 fore that the operation has extirpated at least on the surface, a 

 part of the left median portion and the whole of the right median 

 portion of this gyrus. 



I have stated already that the cavity broadened to the right, and 

 attained its largest breadth in the prolongation of the sulcus para- 

 medianus. By the photograph sub I it becomes evident, that in this 

 place the lesion extends over the convolutions lying before and behind. 



A convolution of the lobus anterior lying before the convolution 

 sub 4, and a convolution of the lobus simplex behind it, we may 

 therefore assume, in as much as it is allowed to draw conclusions 

 from the macroscopical aspect, that in the right median part at 

 least one convolution of the lobus anterior and one of the lobus 

 simplex have been injured. It must remain undecided whether the 

 principal defect, situated in the convolution sub 4 fig. II, ought to 

 be reckoned to the lobus anterior or to the lobus simplex. 



It was on purpose I did not hitherto say anything about the 

 macroscopical deviations in the right lateral portion, because, as was 

 stated before, the whole of it was divided from the left portion of 

 the cerebellum and having been thrivelled in the course of the 

 elaboration, it no longer fitted exactly unto the median part, as 

 may distinctly be seen in fig. I and II. 



In order therefore to avoid eventual errors I neglect the macros- 

 copical description of the lateral portion of the posterior lobe. 

 This omission does not involve unsurmountable difficulties, because 

 the description of the sagittal sections remains still to be given, and 

 by means of these latter we shall have to find out which portions 

 have been destroyed and which have been left intact. 



The cerebelliiin having been fixed for some time at the laboratory in 

 Muller's liquid it was inclosed in celloidine and cut in serial sections. 



