42 HUBER. [Vol. XVI. 



process would thus become the neuraxis of the cell, the straight 

 process, with its branches, the dendrites ; a conviction entirely 

 at variance with the facts in the case, as will be subsequently 

 shown. 



Before concluding the review of the literature bearing on the 

 structure of the sympathetic ganglia of Amphibia, mention must 

 be made of Smirnow's (24) later publications on the subject. 

 I wish, however, at this place to draw attention only to that 

 portion of his writings in which he discusses the relation of 

 the network to the spiral fiber and its further course after 

 leaving the cell. 



According to Smirnow, the spiral fibers extend toward the 

 periphery, and are, according to the location of the nerve cell, 

 distributed to various peripheral tissues. "They form anasto- 

 moses with other cells, in so far as they may join the processes 

 of other cells ; or may become continuous with the network 

 enclosing other cells ; or they may be distributed to heart 

 muscle or form vasomotor fibers to the blood vessels. The 

 distribution of the spiral fibers is such that, as a rule, a portion 

 of it serves to form anastomoses with other cells, while the 

 remaining portion goes to muscle tissue or to blood vessels." 



Nearly all writers who, after Ehrlich, have used the methylene 

 blue method in their investigation of the sympathetic ganglia 

 of Amphibia, are agreed that the spiral fibers and the network 

 enclosing the cell body are continuous, and that they stain more 

 readily than do the other structures of the ganglion. There 

 exists, however, a difference of opinion as to the nature of the 

 spiral fibers; Ehrlich (18), Aronson (19), and Retzius (21) look- 

 ing upon them as cerebro-spinal fibers, while Arnstein (20), 

 Smirnow (24), and Feist (23) ascribe to them other properties. 



The results obtained by the writer will be taken up as 

 follows : 



i) Sympathetic ganglion cell of Amphibia, its structure, the 

 straight process and the capsule of the cell. 



2) The spiral fibers and the pericellular network and the 

 course of the spiral fiber after it leaves the straight process. 



Sympathetic Ganglion Cell of Amphibia. — It may be stated 

 at the outstart that the writer regards the sympathetic neuron 



