130 

 openiafi of ths neuropora, just beneath the surface of «hat is 

 really the most anterior part of the pallium. Other neurones 

 of the same group are found at deeper levels, in the striatun,, 

 of course. The entire (group is distributed, therefore, without 

 regard to the anatomical boundaries vthich ^a seek to dra» be- 

 t/»een the pallium and the striatam. 



A sagittal section of the neuroporic nucleus stained by 

 the 3olgi method exhibits a bewilderinfs nervous tangle. The 

 components of this plexus are the processes of the intrinsic 

 neurones, and the terminations of the olfactory fibres *hich 

 s/»eep over from the tractus. The nucleus is seen, then, to be 

 an additional olfactory centre. 



Two neuroporic neurones are sho/»n in Pig. 37, exclusive of 

 the maze of nervous processes in flhich they lie. The cell- 

 body is large, the largest, in fact, of any found in the fore- 

 brain. Its form is quite distinctly polygonal, the number of 

 sides being determined by the number of dendrites. Tne den- 

 drites are very thick at their bases, and they are some three 

 to five in number. Each one soon breaks up into large branch- 

 es. The length of a dendrite is relatively short. Its sur- 

 face exhibits thickenings and minute knobs sparingly distrib- 

 uted. 



The axone may arise from the cell-tody, but in most in- 

 stances its origin is traceable to the thick base of one of 

 the dendrites. The several axones from each lateral half of 

 the nucleus run anteriorly to the level of the neuropore, where 



