160 EDWARD PHELPS ATJ-IP, JtJN. 



superficialis, runs forward, laterally and downward, along the 

 lateral surface of the anterior portion of the nasal capsule, 

 and owing to breaks in the sections at this point could not 

 be definitely traced. It ran down toward and seemed to be 

 distributed to the region adjoining the antero- lateral end of 

 the uasal-ilap cartilage, where the supra-orbital lateral canal 

 comes into close relation with that cartilage. 



The only branches of the profundus nerve that were 

 sufficiently large to be distinguished and traced thus go 

 either to the eyeball or to the nasal capsule. The nerve, 

 however, diminishes in size between these several branches, 

 and certain of its fibres may have a diiferent and general 

 distribution. That the nerve has anything whatever to do 

 with the innervation of the ampullary tubes, as Ewart states 

 is probable in Lsemargus (17, p. 527), I gi-eatly doubt. 

 Certain of the terminal branches of the nerve would seem to 

 correspond to the branch said by Cole (11) to be dis- 

 tributed, in Chimsera, to the " outer surface of the inner 

 wall of the nostril.'^ This nerve Cole considered as the 

 probable horaologue of the motor division of the profundus 

 of the Cyclostomes. This will be later further discussed. 



Whether the distribution of the only apparent branches ot" 

 the profundus to the eyeball and the nasal capsule has any 

 morphological significance or not, or what that significance 

 may be, I cannot venture to assert. The nerve is evidently 

 the nasal or naso-ciliary nerve of the higher vertebrates, as 

 is genei-ally asserted and accepted, and the dorsal and 

 proximal one of its two orbital branches would correspond 

 somewhat to the lachrymal nerve of man, the ventral and 

 distal one corresponding somewhat to the iufra-trochlear nerve. 



Tr uncus Buccalis-maxillo-mandibularis. 



The truncus maxillo-raandibularis or trigeminal part of the 

 large buccalis-maxillo-mandibularis nerve trunk arises from 

 the antero-veutral part of the extra-cranial portion of the 

 trigemino-facial ganglion, the ramus buccalis arising from 

 the antero-dorsal part of the same ganglion. That pai-t of 



