PHYSIOLOGY, AND PATHOLOGY OF THE CHIMPANZEE. 



405 



twigs running along the oesophageal branch of the cceliac axis, 

 coronary plexus, and oesophageal nerves, which ramify over the 

 lower end of the oesophagus. It anastomoses with branches of 

 the right vagus. The right vagus (R.V) passes through the 

 posterior part of the oesophageal opening in the diaphragm, 

 and it ends in the left semilunar ganglion. The branches 

 are very numerous and extend widely in the abdomen. They 

 are : — 



1. (Esophageal nerves (O.N) to the back of the lower end of 

 the oesophagus. 



Text-figure 46. 



Abdominal parts of the vagus and sympathetic nerves. Letters in text. 



2, Gastric nerves (L.C.N) running along the lesser curvature 

 of the stomach. 



3. Twigs to the hepatic (H.P), coronary (G.P), splenic (S), 

 superior mesenteric (S.M.P), inferior mesenteric (I.M.P), and 

 aortic (A.G.C) plexuses. The twigs can be traced far into the 

 plexus, some in fact being so well marked that they can be 

 followed to the organs. I did not trace twigs as far as the 

 caecum nor covild I trace them to the sigmoid and rectum. 



Proc. Zool. Soc— 1923, No. XXVII. 27 



