60 bulletin: museum of comparative zoology. 



side to emerge through the same foramen with another large branch 

 (Ing. V. + cd. tym.), which includes the chorda tympani (Plates 2, 3, 

 and 5, figs. 5, 6, 12). Upon its exit from the jaw it turns ventrally, 

 dividing to send to the skin a branch which also includes a small 

 motor twig {myl-hy.) supplied to the mylo-hyoideus muscle. The main 

 part goes farther cephalad among the interlocking ends of the mylo- 

 hyoideus and cerato-mandibularis muscles to an overlying cutaneous 

 area between mandibles (Plate 4, fig. 9, md?). 



(c) A short distance cephalad of the place where (a) and (b) are 

 given ofi", the main ramus bears on its dorsal side a sympathetic 

 ganglion (Plates 2, 3, figs. 5, 6, gn. md.), which is composed of small 

 cells forming a group flattened against the sides of the chorda tympani 

 and alveolar portions of the nerve. As the combined lingualis and 

 chorda tympani separate from the intramandibular portion of the 

 nerve, the cells of this ganglion crowd down into the angle thus formed 

 in the shape of a wedge. As in other sympathetic ganglia, there 

 appears to be no admixture of medullated fibers among the cells. 

 The ganglion seems to be more closely associated with nerve V than 

 with nerve VII, and after the division its cells continue forward, ap- 

 pearing in a number of sections within the perineurium of the alveolar 

 part. 



Gaupp ('88, p. 460) states that in Lacerta there is an "Anschwel- 

 lung" at the point of union of the chorda tympani with the alveolaris. 

 He also refers to the lingualis, which includes the chorda tympani, as 

 given off immediately after this union. This swelling undoubtedly 

 corresponds to the mandibular ganglion {gn. md.) of Anolis. 



The lingual ramus of V passes out of the jaw in a common sheath 

 with the chorda tympani (Plates 2, 3, 5, figs. 5, 6 and 12, Ing. V + 

 cd. tym.). The combined bundle goes cephalad for some distance 

 without branching, then divides into two rami of about equal size. 

 The dorsal one is composed almost entirely of the fine fibers of the 

 chorda tympani and will be considered as the continuation of that 

 nerve, to be described with the facialis. It includes, however, about 

 a dozen large cutaneous fibers. The other (ventral) division is almost 

 entirely cutaneous, as is shown by comparison with ramus {md.-), 

 which lies next to it. It contains, however, some of the fine fibers 

 characteristic of the chorda tympani. It appears, therefore, that in 

 the final separation of the lingualis and chorda tympani there is a 

 slight interchange of fibers. 



The lingualis {Ing. V.) now runs cephalad and divides for distribu- 

 tion to the papillae of the tongue. In this peripheral region, however, 



