14 JoURNAL OF COMPARATIVE NEUROLOGY. 
stainable masses are large at the periphery asin Fig. 2. The 
remaining part of the cell-body is filled up with small stainable 
masses. The arrangement of the masses is not regular. The 
cell-body stains deeply and has a tendency to shrink slightly. 
This large number of varieties among the spinal ganglion 
cells calls for an explanation. 
It seems to me very probable that the smaller cells, which 
were regarded as in a pathological condition or as artifacts 
(chromophilic cell) by some of the previous investigators! are in 
many cases the growing stages of the normal cells. 
To support this view let us consider the evidences of 
growth in the spinal ganglion as determined by other in- 
vestigators. 
IV. REVIEW oF GROWTH CHANGES IN THE SPINAL GANGLION. 
Hopce! counted in the frog the number of fibers in the 
posterior root and the number of the cells in the spinal ganglia 
of several nerves. From these observations he obtained the 
following results: 
TaBLE I]1]—Showing the number of fibers and cells in the afferent spina 
nerves of a Frog (probably Bull-frog). Weight not given but probably 150 
grams in body-weight—(after HODGE). 
No. of cells in) Excess of |Ratioofone fiber 
No. fibers in dorsal root ganglion. cells to cells. 
Seventh nerve 
(Right side) 1128 2767 1639 1:2.45 
Eighth nerve 
(Left side) 1811 5416 3605 1:2.94 
Seventh nerve 1364 
(Left side) 1 1340 4456 3104 1:3.26 
T’s count 
From the above table, we find that one afferent fiber of 
1 The word chromophile was first used by FLEscH to describe the cells 
which stain diffusely ; later Nisst applied the term to the cells in which the 
stainable substance appears to be evenly diffused throughout the cell-body. This 
kind of the cells was considered by Nissi as pathological or an artifact (NISSL, 
Ally. Zeschr. f. Psychiat. etc., Berl. (’96), Bd. iii, S. 8). 
1HopGE, C. F.—Some effects of electrically stimulating ganglion cells. 
Amer. Journ. of Psychology, Vol. II, ’88. 
