780 

 solution of (27), we arrive at the two important relations: 





n-§. 



(29) 



ill which <^ /?(fi) <^ .y -f 1, c =| - 0, aii<l tlie conditions mentioned 

 under II oblaiii. 



± r y£) . , . , %• f 1 Y" r /.(.-i/^= ^) r ia^^^-e,) - 



(i aai 



§m - 1 V "I f 



r/^..^.-g,„)__^ r_^fe^-,-.,„^,.g,„..,..,J (30) 

 J ^/^vI;^£^ rfi,„J(.^„.-sS„+i)i-"'+>> - ^ ^ •" I 



■'■ i_„ 1 



= ri,> + ?.)0-'y T(-i^-5) ^/-(i-,.)(/si/.r^i)/(''+i-"-')(S)rfë, I 



in whicii — ?i<^/?(A)<^ — ?z + 1^ ('* positive integer or zero), 

 <^ R{n) <^ s -{- 1 , c =1 - and the conditions mentioned under III 

 obtain. 



Anatomy. — "Oa the conus medallaris oj the domestic animals." 

 V\y Dr. H. A. Vermeulen. (Communicated by Prof, C. Winkler). 



(Communicated in the meeting of October 30, 1915). 



The material used in this research was derived from 4 horses, 

 a calf's foetus of 4'/^ months, 2 goats, 2 sheep, a pig's foetus of 3 

 months, 3 dogs and a cat. Of that of 2 horses, 1 dog and J sheep 

 longitudinal sections were made, that of the other animals was 

 cut into transverse sections. (Paraffine inclusion, sections of 12 — 18 fj, 

 colouring with cresil violet.) 



In all our domestic animals the spinal cord reaches further in the 

 spinal canal than in human beings. Whereas in the latter the conus 



