070) Dr. HARRIS H WILDER, 



upward several small muscular branches to supply the tem- 

 poralis. 



2) The largest of the above branches supplies also a part of the 

 pterygo-maxillaris. 



3) A large branch runs outward into the raasseter. 



4) A recurrent branch, the largest of all, runs backward through 

 the substance of the masseter. This in turn gives oft an 

 important branch which passes through the mandible between 

 Meckel's cartilage and the Os dentale, and supplies M. inter- 

 maxillaris anterior. 



5) The main nerve , in its mandibular position , breaks up into 

 small branches which supply the integument of the lower lip. 



Facialis and Acusticus (fig. 9, green). 



The facial and acustic nerves arise from a common ganglion 

 which forms a long, semicylindrical roll, running along the inner side 

 of the Os petrosum and extending from its posterior origin in the 

 medulla, as far forward as the Gasserian ganglion with which it blends. 

 From this ganglion two acustic trunks pierce the auditory capsule 

 and supply the ear while two facialis trunks pass through the 

 cranial walls. The anterior auditory and posterior facialis trunks are 

 blended at their origin thus making it seem as if only three trunks 

 issued from the ganglion. 



Acusticus (fig. 1), green, diagonal lines). 



As before stated the acustic elements are supplied by two trunks, 

 the posterior passing into the ear at the posterior end of the ganglion 

 while the anterior, blended at its origin with the posterior trunk of 

 the facialis, soon separates and reaches the ear as described below 

 under N. facialis. 



Facialis (fig. 9, green). 



Posterior trunk. This trunk, containing also acustic elements, 

 passes from the ganglion through a long, mainly osseous canal in the pe- 

 trosal bone, directly beneath the auditory capsule. During this passage, 

 the acustic elements separate themselves and boring upward through 

 the floor of the ear capsule, form the anterior acustic trunk. 



The facial elements pass outwards and then forwards, appearing 

 at the upper anterior angle of M. digastricus, They then divide into 



