THE CRANIAL NERVES OF ONE OF THE SALAMANDERS QI 



The auditory nerve enters the ear capsule in two parts. The main 

 part turns forward to the anterior part of the capsule, and the other 

 part, a small twig, enters by a separate foramen and turns backward. 

 Kingsbury' describes in Necturus a small part of VIII, which enters 

 by a separate foramen and immediately unites with the main part of 

 of the nerve. In the accounts of this nerve in all other Urodela only 

 one part is mentioned. 



IX-X. Just back of VII-VIII there arise three separate roots from 

 the lateral part of the medulla. The nerves arising from these roots 

 unite later in a common ganglion. These are the roots of the glosso- 

 pharyngeal and vagus. The anterior of these roots is the smallest 

 and enters the ganglion as a separate nerve. The other two unite into 

 a common trunk before entering the ganglion. Near the inner end of 

 the ganglion there arises from its anterior surface a nerve composed, 

 largely at least, of fibers from the anterior root. It passes off in a 

 latero-ventral direction. Not far from the ganghon, it receives the 

 branch from VII. This nerve is probably the glossopharyngeal. The 

 remaining three branches constitute the vagus. 



1 B. F. Kingsbury. "On the Brain of Necturus maculatus." Jr. Comp. Neur., 5: 148. i8ps- 



