72 



neurones comprising the granular l-iyer ars inclnied in this 

 class. The distinctive fe>itares of such a neurone (F'i^.l'^) 

 embrdce a roundel cell-body having a few short dendrites, and 

 an axone vrhich ascends through the levels of the granular lay- 

 er above its point of origin to the molecular layer, where it 

 divides in a T-like manner. 



The size of the cell-body varies slightly, but it is al- 

 vtays smaller than a neurone of Purkinje. As to shape, there 

 is considerable diversity. The derivative form appears to be 

 a rounded one, but this has been subjectei to much modification 

 by the origin of the dendrites so that triangular, rectangular, 

 and varioas polygonal outlines are given. 



The internal structure of the cell, (F'i?.51), consists 

 chiefly of the nucleus, only the faintest halo of cytoplasm 

 being visible at any point; even the bases of the dendrites 

 can hardly be recognized .vith purely cytological stains. Dem- 

 onstrated '.Tith either methylen-blue or iron haematoxylin, the 

 nucleus is found to contain a few very coarse and irregular 

 chromatin granules strung on fine interlacing threads of linin. 

 The presence of a nucleolus is doubtful, at least it is dif- 

 ficult to distinguish one from the masses of chromatin. Fig. 

 ol also shows how closely these neurones are packed. 



The dendrites are three or four, only, in number, aris- 

 ing from the cell-body at approximately equidistant points 

 (?ig.ln). A dendrite is short anl nearly always relatively 

 stout. Its course involves sinuous curves. Tt branches bat 



