102 



DR. C. F. SONNTAG ON THE VAGUS AND 



The thoracic cords have few ganglia. The first left ganglion 

 (G.S) is long, and connected by the Annulus of Vieussens (A.V) 

 to the inferior cervical ganglion. When ganglia are present 

 they lie on the necks of the ribs. The left cord is tortuous 

 and diminishes in thickness from before backwards ; it united 



Text-figure 2. 



The posterior thoracic and abdominal parts of the vagus and sympathetic nerves 

 in Tamandua tetradactyla (A), and the fused vagus and spinal accessory 

 nerves in the lacerate foramina (B). The vagi have been drawn to the 

 right so as to extend the cceliac plexus. Letters in text. 



posteriorly by two filaments with a branch running up to the 

 aorta at the upper end of the descending part. The right 

 sympathetic is larger than the left one, and is not connected to 



