Herrick, Cranial Nerves of the Cod Fish. 273 



expands to fill the space between the origins of the hyomandib- 

 ular trunk and the infra-orbital trunk, and still farther cephal- 

 ad this latter portion of the ganglion bulges out through the 

 foramen and over the origin of the infra-orbital trunk, th-us 

 forming the extra-cranial portion of the ganglion (Fig. 7). 

 Meanwhile ganglion cells have appeared throughout the root 

 and this more mesal portion of the ganglion continues forward 

 a short distance into the supra-orbital trunk (Figs. 8, 9). 



The relations of the trigeminal rami present no points of 

 morphological difficulty. A considerable number of general 

 cutaneous fibers is given off from the extra-cranial portion of 

 the Gasserian ganglion which accompai^y the otic and outer 

 buccal nerves to the skin near the lateral line organs which 

 these nerves supply (Fig. 7, r. ot. cut.. Fig. 8, out. buc. cut.). 

 Neither these two general cutaneous nerves, nor the one next 

 to be mentioned are figured on the reconstruction, Fig. i. 



From the intra-cranial portion of the Gasserian ganglion 

 the r. ophthalmicus superficialis V arises and most, if not all, 

 of the r. maxillaris V, while the r. mandibularis V arises chiefly 

 from the extra-cranial portion of the ganglion. The origins of 

 the r. maxillaris and r. mandibularis V are essentially as in 

 Menidia, except that they separate from eachother sooner, 

 i. e., the truncus infra-orbitalis is very short. 



5. 7^1? Motor Facialis. 



The course of the motor V fibers through the ganglionic 

 complex is implied in the account of the trigeminus root above. 

 The motor VII should receive a more detailed mention, since 

 there is reason to believe that some of these fibers have been 

 recently interpreted incorrectly. 



The root may be traced from the fasciculus longitudinalis 

 dorsalis out to the hyomandibular trunk almost exactly as in 

 Menidia. It is about as large as in Menidia and takes the same 

 course, running through the dorsal part of the spinal V tract 

 and applying itself to the inner face of the compound lateral 

 line root of the facialis (Fig. 2). As the ventral lateralis root 

 separates from the dorsal, the motor VII swings up and occu- 



