Herrick, Nerve Components of Bony Fishes. 305 



the organ 0.6. The fibres for the other naked organs 

 supplied by this branch in the specimen figured are sup- 

 pHed by a branch arising cephalad of the second branch 

 (the third branch of this specimen). Branches i and 2 

 arise apparently from the coarse-fibred component. Be- 

 tween the second and third branches in this specimen the 

 nerve splits into the fine-fibred and coarse-fibred bundles 

 as in the other case, and the third branch arises from the 

 coarse-fibred bundle. The fourth branch is absent. The 

 fifth arises from the coarse- fibred bundle just as it is re- 

 joined by the fine fibres. The sixth branch supplies two 

 organs caudad of the second canal organ and doubtless 

 some cephalad. Its ultimate course was not traced. 



At 430 the seventh and eighth branches of the r. man- 

 dibularis VII are given off together. They both arise 

 apparently from the coarse-fibred component and pass 

 ventrad to the dorsal surface of the bony opercular canal. 

 The eighth branch turns cephalad along the dorsal sur- 

 face of the preopercular bone, while the seventh, which is 

 four or five times as large, passes through a foramen into 

 the bony canal at once, thence cephalad to supply the 

 second and first organs of the opercular canal. 



The seventh branch is composed of very coarse fibres ; 

 the eighth branch chiefly of medium fibres, with some fine 

 ones intermingled. The latter branch continues cephalad 

 along the dorsal and outer surface of the preopercular 

 bone and under the fleshy origin of the m. adductor man- 

 dibulte. It increases in size cephalad and ultimately joins 

 a branch of the r. mandibularis V {c. V-VII. /). This 

 branch very clearly contains fibres from both the facial 

 and the trigeminus. The former continue forward after 

 the anastomosis with another trigeminal branch and 

 finally supply three naked sense organs along the man- 

 dibular canal. They will be further discussed in connec- 



