Emmel, Chorda Tympani in MicroUis. 4 1 7 



later stages this nerve occupies a position over and in front of 

 the closed end of the spiracular cleft which is generally accept- 

 ed to be the fundament of the tympanum. 3. The chorda 

 tympani is, therefore, a post-spiracular nerve, and is to be con- 

 sidered as the homologue of a post-trematic nerve of fishes and 

 amphibians. 



