154 



DR. C. F. SONNTAG ON" THE VAGUS AND 



.incl is continued as a tliick nerve Avhich ends in the cceliac gang- 

 lion (text-fig. 8, c.g). Tlie latter ends in a large ganglion whence 

 two nerves emerge. One joins the lateral division and the other 

 becomes the gangliated cord of the sympathetic. In the thorax 

 it gives branches to the aortic plexus (A.P) and a long branch runs 

 to the cceliac ganglion. The latei-al division of the cord, and the 

 coeliac branch of its mesial half constitute splanchnic nerves 

 (Sp.N). 



Text-fi£ui"e 8. 



L.a 



ffSfi.P 



The Thoracic and Abdominal Sympathetic of Hyrax capensis. V.B : aortic 

 and oesophageal branches of the vagi; L.D : line of diaphragm. Other 

 letters in text. 



The abdominal part of the left sympathetic (text-figs. 7 and 8) 

 possesses four ganglia. It gives off two groups of lateral branches 

 to the semilunar ganglion, i-ami communicantes to the lumbar 

 nerves, and branches to the aortic plexus. It has a great ten- 

 dency to subdivision. 



The thoracic part of the right sympathetic (text-fig. 8, R.s) has 

 few ganglia in the anterior part, and its postei'ior part is very 

 complicated, but not so much as the left cord. It divides into 

 mesial and lateral parts and these are united at intervals by 

 common ganglia or communicating branches. The lateral 

 division ultimately continues the cord back to the sacrum. The 

 mesial division is thick and strons;. Branches of the cord run to 



