VAGUS NERVE OF THE TURTLE 311 
The ganglia are also entirely separate. There are a few very 
minute and one fair sized communicating branch between the 
two nerves in this position. The cells in the thoracoabdominal 
\ S = ’, YS ‘ 3 
\ x — s ry) 4 WS et 
SN we us 
lig. 7 Section of the vagus at the level indicated by 7, figure 1. a, ramus 
descendens hypoglossi; b, N. hypoglossus; c, ramus thoracoabdominalis vagi; 
d’, N. esophageus; d’’, N. laryngopharyngeus; e, truncus sympatheticus. Osmic 
acid. X 36. 
ganglion of the vagus are distributed along the nerve for some 
distance, so that the ganglion although of good size does not 
produce much of an enlargement on the nerve. 
It is of special interest that the structure of the thoracoab- 
dominal ramus is the same at all levels. It is the same high 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 25, No. 3 
