2/0 Journal of Comparative Neurology. 



root. The communis and motor VII roots emerge at the same 

 transverse level and in about the same relations as in Menidia. 

 The dorsal and ventral lateralis roots do not separate at once, 

 but run forward together until the level of the origin of the 

 trigeminus root is reached. Ganglion cells appear scattered 

 through both dorsal and ventral portions far caudad of this 

 point, so that the dorsal and ventral lateralis ganglia can be 

 only imperfectly separated. Ganglion cells, however, extend 

 out a short distance into the rami beyond their separation. 



The communis root emerges mesially of the dorsal portion 

 of the lateralis roots, but soon comes to lie in the notch be- 

 tween the dorsal and ventral roots, from which, however, it is at 

 once crowded ventrad by the emerging trigeminus. As soon 

 as the two lateralis roots separate, the motor VII root is pushed 

 in between them, lying laterally of the trigeminus root and of 

 the dorsal edge of the communis root (Fig. 3). 



The ventral lateralis root enters the truncus hyomandibu- 

 laris in the way typical for teleosts, turning sharply ventrad and 

 emerging from the cranium at once after separating from the 

 dorsal root. The dorsal lateralis root, after separating from the 

 ventral, continues cephalad a short distance, the motor VII and 

 the sensory V roots crowding in between the two lateralis roots 

 as already mentioned. A small root of the r. lateralis accesso- 

 rius {rec. j, Fig. 1) also passes between them in this region, as 

 will be described beyond. The dorsal root divides a short dis- 

 tance beyond the ganglion into the r. buccalis and the r. oph- 

 thalmicus superficialis VII in the usual manner. The former 

 gives off at once the otic and outer buccal nerves and then turns 

 ventrad with the infra-orbital trunk. The latter continues ceph- 

 alad in the original relations, forming a part of the supra-orbital 

 trunk. The courses of these nerves through their trunks will 

 be described below. 



J. The Communis Root of the Facialis. 



The fasciculus communis root of the facialis pursues its 

 intra-cranial course and terminates in the lobus vagi essentially 

 as in Menidia, though it is considerably larger in Gadus. The 



