NoRRlS, Nerves of Amphiwna. 549 



to the hyoid arch as far as the tip of the latter, supplying the floor 

 of the mouth at the sides. From the pretrematic proper there 

 passes an anastomosis with the r. alveolaris VII. The fibers of 

 the anastomosis on entering the alveolaris pass some centrally 

 and some peripherally. Between the pretrematic proper and the 

 pharyngeal branch there may occur anastomoses (fig. 21). Some- 

 times the pharyngeal anastomosis with the r. alveolaris comes from 

 the main pretrematicus (fig. i). From the pharyngeal branch 

 there may pass a branch into the main hyomandibular trunk 

 (fig. 21). Thus there may be formed in the hyoid and mandibular 

 region a plexus between the IX and VII nerves, consisting of 

 communis and possibly sympathetic fibers, all the fibers of which 

 are destined presumably to supply blood vessels and the mucous 

 membrane of the mouth and pharynx. Some of the smaller twigs 

 of this plexus can be traced into the close vicinity of blood vessels 

 of this region. Of isolated ganglia or ganglion cells in this region 

 I find none. 



It is the pretrematic division of the IX nerve that Kingsley 

 considered the glossopharyngeus proper. He was thereby led into 

 the error of supposing that the IX nerve contains no motor fibers. 

 He failed to discover the actual anastomoses with the seventh 

 nerve. The branch that anastomoses with the palatine he cor- 

 rectly termed the pharyngeal. The main pretrematic branch he 

 designated provisionally the hyoid branch. According to him the 

 r. supratemporalis X is a branch of the glossopharyngeus. I find 

 the former more intimately associated with the r. communicans 

 at its exit from the ganglion. 



As the posttrematic division of the glossopharyngeus ascends 

 to the level of the dorsal border of the branchial arches it gives off^ 

 from its ventral border several small pharyngeal twigs, as described 

 by Druner. As the trunk turns to pass laterally between the 

 dorsal ends of the hyoid and first branchial arches it gives off a 

 small motor branch {lab. i) to m. levator arcus branchialis i. A 

 little more laterally a small general cutaneous branch runs obliquely 

 postero-laterally over the first branchial arch to the skin of that 

 region. This general cutaneous component of the glossophar- 

 yngeus is so small that I have as yet detected it in but one individ- 

 ual. Mention of it was omitted in my preliminary paper. 

 Druner says that the first branchial nerve sends two branches 

 to the m. lev. arc. br. i. As he does not mention this general 



