158 



kidney after a very short course. Of the three others two 

 join to form the dorsal Nerviis sphmehnicus {n. spJ) lying 

 over the above artery, but before joining one of them 

 gives off a thin twig which accompanies the oesophageal 

 artery. The fourth branch, after giving off a fine twig 

 to the kidney, becomes the ventral N. splanchnicus 

 [n. sp."), lying under the artery. The latter nerve is for 

 some part of its course opposed to the R. intestinalis of 

 the vagus. When the coeliaco-mesenteric artery divides 

 into a dorsal coeliac and a ventral mesenteric artery, the 

 two RE., splanchnici also divide (cp. figure). 



From the first spinal sympathetic ganglion (1') three 

 nerves arise. One of these is certainly, and another pos- 

 sibly, a R. communicans to the ventral ramus of the first 

 spinal nerve (com. 1). The third seemed to enter the 

 jugular ganglion of the vagus, but this is not certain. 

 From sections 730 to 704 the cord is attached to the inner 

 surface of the root and ganglion of the Truncus branchialis 

 primus N. vagi, but as far as could be ascertained 

 exchanged no fibres with it. The first spinal sympathetic 

 ganglion occupies an intermediate position between the 

 cranial and spinal sections of the cord, since it is con- 

 nected both with the vagus and first spinal nerve. 



After leaving the first spinal ganglion, the cord is 

 continued forwards as the cranial sympathetic, and from 

 section 702 to 078 accompanies the superior jugular vein, 

 during which it bears a very small ganglion (8). After 

 leaving this vein it bears ganglion 7 and becomes attached 

 to the inner surface of the glossopharyngeus ganglion and 

 trunk (658-620), being wedged in between the latter and 

 the skull, and bearing ganglion 6. In front again, when 

 the glossopharyngeus splits up, it accompanies the ventral 

 edge of Jacobson's anastomosis (618-560), and swells into 

 a very large ganglion (5) very closely related to Jacobson's 



