54 HUBER. [Vol. XVI. 



as in cell A, Fig. 12 (in which case the neuraxis was recog- 

 nized by a nucleus of the sheath of Schwann, b, of figure), or 

 again, cell D of Fig. II, where the neuraxis was recognized 

 by its greater affinity to the methylene blue. It should be 

 stated that the figures here reproduced were sketched from 

 sections of sympathetic ganglia of Chrysemys picta and Chel- 

 ydra serpentina, which accounts for the abrupt ending of some 

 of the processes. The facts here given have been abundantly 

 verified on fresh tissues. 



In methylene blue stained preparations of sympathetic gan- 

 glia of Reptilia, examined fresh or in sections of such ganglia 

 fixed in ammonium molybdate, the chromophile granules of the 

 protoplasm are clearly seen. These granules vary in shape and 

 size, and are distributed more or less evenly through the cell 

 protoplasm, leaving free, however, a narrow zone immediately 

 surrounding the nucleus, as may be seen in PI. IV, Fig. 12, 



The cell body of the sympathetic neuron of Reptilia is sur- 

 rounded by a nucleated capsule, which seems continuous with 

 the neurolemma of the neuraxis of said cell ; although my 

 observations on this point are not conclusive. 



Within the capsule of many of the sympathetic cells (and 

 this is especially true of the large unipolar cells above described) 

 are found a varying number of nuclei, the nature of which has 

 not been clearly determined. They are always recognized in 

 sections of ganglia stained in methylene blue and double-stained 

 in alum carmine ; they may, however, also be seen in sections of 

 ganglia hardened and stained in the more usual methods. In 

 discussing similar nuclei found within the capsule surrounding 

 the sympathetic ganglion cells of fishes, it was mentioned that 

 these nuclei were looked upon as nuclei of neuroglia cells. 

 Cajal has described cells which he regards as neuroglia cells in 

 the superior cervical ganglion, and Dogiel (40) has drawn atten- 

 tion to spindle-shaped or star-shaped cells with long branch- 

 ing processes found in the sympathetic ganglia of Mammalia. 

 Such cells, stained in methylene blue, are shown by Dogiel in 

 PL XIV, Fig. 15. They are described as forming a network 

 outside of the capsule of the ganglion cells. By reason of 

 the fact that neuroglia cells are not stained in methylene blue, 



