41 6 Journal of Comparative Neurology. 



The pre-spiracular branches of the facialis are given off 

 together from the geniculate ganglion. All of these fibers ap- 

 pear to arise from this ganglion, i.e., to be of communis nature, 

 though this point cannot be certainly determined in the absence 

 of microscopical examination. The palatine is the largest of 



/'. oph. sup. 



r. oph. profundus 



r. maxillans+r buccalis 

 r nandib. V 



palatinus 



chorda tijmparu 



hyoid arch 



i 



Fig-. I. Dissection of the facial nerve of the spiny dog shark, Squalus 

 acanthias, L., as seen from above, the eye and palato-quadrate bai* having been 

 removed. X 2. The figure shows the mode of origin of the chorda tympani 

 and its course to the inner edge of the lower jaw. Its further course on the 

 ventral surface is indicated by the dotted line between the mandible and the 

 hyoid arch, only a part of the outer border of the latter being indicated. 



them and the r. pre-trematicus in the strict sense is the first 

 branch to be given off, the chorda tympani separating some- 

 what farther distally. The pretrematic ramus in this speci- 

 men arises by one root and the chorda by two, these all anas- 



