«hsr3 there has been little pressure, the rounJei form of tne 

 cell-boiy iiay be retainei (Pig.3,n^.). In certain closely 

 packed tracts, the cell is squeeze! into lenticular forrn. In 

 centres .vhere many oiin'ite fibres interlace, there may be har-i- 

 ly any body to the cell at alL, the matter bein^ chiefly in 

 the radiating processes (Pig. 11). In every instance, the proc- 

 esses exhibit tortuous irregularities due to their insinuation 

 between the nerve-fibres among vhich they lie. 



Another type of neurogliar cell appears to be character- 

 istic of the ventral part of the oblongata, occurring in some 

 numbers in the formatio reticularis (Pig. 3). The cell-body is 

 large, elongate!, .viti great processes eoierging from its ends 

 and a fe« smaller ones from its sides. The large processes 

 take a course in the radius of the oblongata. They give ori- 

 gin to secondary and tertiary branches, the finer ones of ^vhich 

 lie at right angles to the coarse of the principal branch. 

 The flhole system does not spread vfidely, but has the appearance 

 of compression in one plane. 



The astrocyte is evidently an important supporting ele- 

 ment for the iniividual nerve-fibres between which its proc- 

 osses twine. The second class of neurogliar cell described 

 seems to be aiaptei to the supporting of bundles of nerve- 

 fibres. The arcuate fibres of the formatio reticularis pass 

 in groups through the spreading brush of such neurogliar proc- 

 esses and are thereby given support. 



