Herrick, Cranial Naves of Bony Fishes. 167 



The dorsal lateralis root also has a separate ganglion and sup- 

 plies organs of the infra-orbital and supra-orbital lines, via the 

 r. buccalis and r. ophthalmicus superficialis VII respectively. 



13. The nucleus of the motor F// corresponds in position 

 and structure to the n. ambiguus and the root is related to the 

 dorso -median fasiculus exactly like the motor IX root. It is, 

 at its origin, distinct from the sensory roots of VII and supplies 

 the mm. levator operculi, adductor operculi, adductor hyo-man- 

 dibularis, adductor arcus palatini and the branchio-stegal mus- 

 cles, as usual among the teleosts. It does not, however, supply 

 the m. genio-hyoideus, as usually stated, 



14. The sensory V is composed exclusively of general 

 cutaneous fibers. It receives the whole of the pre-vagal spinal 

 V tract. The Gasserian is its proper ganglion and this term 

 should not be applied to any other cells of the V + VII gan- 

 glionic complex. From the Gasserian g. are given off general 

 cutaneous fibers into (a) r. maxillaris V, (b) r. mandibularis V, 

 (c) r. ophthalmicus superficialis V, (d) fibers running back into 

 the truncus hyo-mandibularis VII for the operculum, also (e) 

 a very small r. profundus V. The latter accompanies the sym- 

 pathetic fibers of the radix ciliaris longa of the ciliary ganglion 

 to that ganglion after which they can no longer be separately 

 followed. The relations of this nerve, which has not before 

 been described for teleosts, indicate that the embryonic profun- 

 dus ganglion has fused with the Gasserian. 



15. 'WvQ motor V nucleus resembles that of the motor 

 VII, but lies farther laterad and dorsad. The fibers enter the 

 r. mandibularis V and supply the mm. dilator operculi, levator 

 arcus palatini, adductor mandibularis, inter-mandibularis and 

 genio-hyoideus. The innervation of the latter muscle has hith- 

 erto been usually assumed to come in teleosts from the VII. 

 This muscle is almost certainly not homologous with the muscle 

 in the corresponding position of other vertebrates which is sup- 

 plied by the i spinal or XII nerve. 



16. The sympathetic chain has ganglia on nearly all of the 

 cranial ganglia and probably sends fibers into all of the rami from 



