12 JouRNAL oF Comparative NEvuROLOGY. 
way than inthe smaller cells. The writer has distinguished 
three types of arrangement in the larger cells. 
One type presents coarse and large masses which exist 
throughout the cell-body without showing any fixed arrange- 
ment. Clear spaces around the nucleus and at the extreme 
periphery of the cell-body are very distinctly visible (Fig. 1). 
Besides the coarse masses, minute powder-like granules are 
visible (see Fig. 2). This type of cell is very abundant. 
A second type of these cells has large and coarse masses 
only at the periphery (Fig. 2), but the remaining part shows 
much smaller masses. The arrangemeut of masses of stainable 
substance is faintly concentric. The clear zones about the 
nucleus and at the periphery are visible. These cells are also 
very numerous in the spinal ganglion. 
In the last type of cells, the stainable substance exhibits a 
beautiful concentric arrnngement around the nucleus (Fig. 3). 
The stainable masses are rather large in size, although in some 
cases they may be small, and as in the first type the large stain- 
able masses are distributed throughout the cell-body. The 
stainable masses show an elongated spindle form. As LuGARo’s 
picture shows, this type of cell suggests the cross section of an 
onion. When the level of section passes through the more 
peripheral portion of the cell-body, the stainable masses show a 
somewhat parallel arrangement, and sometimes they are con- 
tinuous, making a strong heavy line. The clear zones are bril- 
liant. This type of cells is not so abundant.’ The writer has 
classed these three types of the cells as larger cells (Table I, 
Series A and a). 
Another type of cell was observed by the writer, the 
measurements for which are given in: Table I, Series C.  Curi- 
ously enough, this type of the cell body stands between the 
larger and smaller cells as ‘‘intermediate’’ in structure. The 
structure of the cell-body is as follows: The masses of stain- 
able substance distribute themselves throughout the cell-body 
in concentric or irregular layers. The size of the cell-bodies is 
variable; the larger cells measuring 38,24 , and the smaller 
26x21 , in diameter. The most important and interesting 
