390 SYDNEY E. JOHNSON 
The neuraxes of the ganglion cells are only faintly stained, never- 
theless many can be traced to the central fiber bundle and their 
course followed for a considerable distance cephalad or caudad in 
the sympathetic trunk. Preganglionic fibers, in many cases, 
are seen to accompany neuraxes for a long distance before termi- 
nating in spirals and pericellular networks. ‘ 
Details of structure of the pericellular networks have been 
presented by several authors (Huber, ’97, 799), and as this 
part of the subject is relatively a side issue I need only say that 
my observations on this point, to the extent carried out, are in 
accord with those of the author referred to above. Closed net- 
works and free endings have been described, but it has been 
Fig. 2 Longitudinal section of a ganglion stained with methylene blue. 
Note the peripheral position of the cell-bodies and the central location of the nerve 
fibers. X 140. 
pointed out that one cannot be sure whether the free endings 
represent a normal condition or are due to imperfect staining or 
to the level of the section. Both free endings and a closed net- 
work are shown in figures 4 and 5. It should be noted that the 
neuraxes are more prominently stained in the latter than in 
methylene blue preparations. That the pericellular networks 
are intracapsular can be readily seen in preparations stained by 
either method. 
The spirals and pericellular baskets described above constitute 
the only type of nerve ending that I have been able to find in the 
sympathetic ganglia of the frog, either in the normal condition 
or after degeneration of the preganglionic fibers. 
