Say CHI PING 
between the Albino and the Norway rat in regard to the degree 
of aggregation of the Nissl bodies in the cells. Thus, in the 
cells of the Norway, these are not so densely crowded either at 
the periphery or around the nucleus as in the cells of the Albino. 
Furthermore, the space left at one region through the crowd- 
ing of Nissl bodies toward another is not so clear. There is 
therefore always found a gradual thinning out of the granules 
toward the periphery or the nucleus whenever the accumulation 
of them takes place in a reverse direction. 
When the Norway rat reaches twenty days of age, we find . 
in the cells of the superior cervical ganglion a tendency for the 
Nissl bodies to aggregate at the periphery, though the region 
around the nucleus is by no means devoid of them. Likewise, 
when the Norway rat is about sixty or more days old, the Nissl 
bodies tend to accumulate around the nucleus, while the periph- 
ery. still has some of them thinly scattered. Unless carefully 
examined, therefore, the distribution of the Nissl bodies in the 
cells at twenty to sixty days and in those sixty days and later 
would appear the same, i.e., as if they were evenly distributed. 
Like the Albino, the distribution of the granules in the cells 
of the older Norways is fairly even. On the whole, then, there 
is no marked distinction between the two forms, so far as the 
general morphology of these cells is concerned. 
According to Gaskell (’18), both the motor and the inhibitory 
cells are found in the sympathetic ganglion, and Cajal (11), 
using the Golgi method, shows in the superior cervical ganglion 
of a mouse several days old cells which appear to represent three 
different types (fig. 550, B, C, and D). That the four types 
of cells (Ping, ’21) found in the superior cervical ganglion of 
both the Albino and Norway rat are correlated with the several 
functions of the ganglion is‘by no means determined, but, gen- 
erally speaking, we should expect that the morphological dis- 
tinctions would have a functional significance. 
