198 Journal of Comparative Neurology. 



(d). Near the ganglion two branches are given off, each by a 

 distinct foramen. One of these is very small. It passes cau- 

 dad, lying beneath the otic capsule and comes into communica- 

 tion with a branch (6) of the glossopharygeus. It may be de- 

 scribed as a ramus palatums caudalis {r. p. c). The larger 

 branch passes cephalad and constitutes the true ramus palatums 

 (j>). It pursues the usual course but effects a communication 

 with the ramus ophthalmicus trigemini (com. p.), instead of the 

 usual communication with the r. maxillaris. It subsequently 

 terminates in the roof of the mouth by a small branch only, 

 which is continued forward after the communication. 



The remainder of the facial passes directly lateradas a 

 single trunk. At the outer edge of the otic capsule it breaks 

 up into the following rami : 



The ramus hyo-mandibidans (hy. man.) extends laterally 

 through the m. depressor maxillae inferioris and gives off some 

 fibres to the latter (ind.). It extends farther caudally and ven- 

 trally than any of the other rami and receives the communicat- 

 ing branch from the glossopharyngeus (7). A small twig is 

 distributed caudad in three ramuli to innervate the skin and the 

 mucous membrane of the pharynx of this region ; the remaining 

 fibres pass forward to the skin and muscles underlying the cer- 

 ato-hyal cartilage. 



The ramus alveolaris (al.) dips ventrally into the lower jaw, 

 where it passes cephalad on the mesal aspect of Meckel's carti- 

 lage in a canal lying between the latter and the articular and 

 splenial bones. While still within the canal it sends branches 

 to the gums and also a small branch (c. m.) communicating 

 with the ramus mentalis trigemini, which occupies a correspond- 

 ing position in a canal lying a little further dorsad. The ramus 

 alveolaris leaves the bones of* the jaw by a foramen on the ven- 

 tro-mesal border to be distributed to the mucous membrane of 

 the median portion of the lower lip. 



The next two rami pass out together for a short distance, but 

 almost immediately separate. The first of these passes directly 

 out to the side of the head, over the m. depressor maxillae infer- 

 ioris, thence ventrally into the lower jaw and forward in about the 



