( 282 ) 



This form 11 la gives for /•„ tlie value : 



4 



- 'f/ 

 _9 ' _2a^'' 



3 ' 



a.;' 2 a^' 



From the obtained values 7i\ = --— and >•„ = — -- we j^et 



2 />, 3 6, 



7t!„ : r„ = 3 : 4. 

 7>//V, Sept. 1904. 



Physiology. — -' Diuiciwrdtions 'm iIh' niiti'dl ncrrons s^/s(rin after 

 remucdl of the jioccvhis cereheJli\ Hv Dr. L. J. .1. Muskens. 

 (Commuuieated In Pi-of. (\ Winklkk). 



(Communicated in tlie meeling of September 24, 1901). 



In 6 ral)bit.s the flocculus of the ri<iiit side was extirpated. Thi.s 

 organ lies, as is well known, in these animals in a separate bony 

 hole, so that we here have the possibility to remove a part of the 

 cerebellum without disturbing the nervous structures of the neigh- 

 boui-hood in their conditions of nuti-ition as well as of pi-essure. The 

 animals were killed after 8 days to 5 weeks and complete series 

 stained after Marchi, were prepared. 



The degenerations of libi-es aflei- this lesion in 4 of the 6 cases 

 were found exclusively directed upward i. e. to the superior crus- 

 cerebelli and to the pons. 



In one case there was a line degeneration all o\ei- the restiform 

 body; in this case however it could not be made out with certainty 

 whethei' we had to deal with really descenibng degeneration, 

 because lirstly all through the cord tine, black spots were fouml, 

 and secondly the black spots were of so little dimensions, that tliere 

 is much doubt about the genuineness of such a fine degeneration. 

 In this animal the staining was insufficient, irregular and not limited 

 to degenerated nerve-tibres, for an unknown reason, so that we 

 do not think much value can be attached to this single case, in 

 which downward degeneration was found. 



I]i another wellstained case in the restiform Ixxly a number of 

 degenerate fibres on the operated side was found ; also in the longi- 

 tudinal posterior fascicle and in the field of the tecto-spinal bundle, 



