McGregor, Cranial Nerves of Cryptobranclnis. 53 



branch of the first spinal with the second and third spinal 

 nerves. The last two have dorsal roots, and the third takes 

 part in forming the brachial plexus. Communication between 

 vagus and hypoglossus has been discovered in larval Anura but 

 it has not been described, so far as I am aware, in Urodela. 

 Most of the material at my disposal was injured in the neck re- 

 gion so that the relations of these parts could not be clearly 

 ascertained. Many points regarding the intimate relations of 

 vagus and hypoglossal nerves will require a study of serial 

 sections for their elucidation. 



