Herrick, Cranial Nerves of the Cod Fish. 287 



the intra-cranial fiber complex and the extra-cranial ganglion, 

 the nature of which it is impossible to make out in Weigert 

 preparations. But in addition to this, in the figure it will be 

 seen that a small compact bundle of communis fibers separates 

 from the others and passes into the sympathetic ganglion [/ac. 

 a?uist. + r. pt. VII.). These fibers pass through the sympa- 

 thetic ganglion caudad, and before the caudal end of the gan- 

 glion is reached withdraw from it, turning ventrally. These 

 communis fibers take two courses. The first part continues 

 directly caudad and constitutes the Jacobson's anastomosis of 

 Cole. The other fibers run down along the inner face of the 

 m. adductor hyomandibularis, spreading out under that muscle 

 upon the mucosa of the roof of the mouth, which is here 

 richly supplied with glands and taste buds. 



10. The Ramus Pre-trematicus Facialis. 

 These fibers last mentioned correspond in their distribu- 

 tion exactly to what I have termed the r. pre-trematicus VII in 

 Menidia, Several twigs turn cephalad upon the mucosa near 

 the median line. The larger part spreads out over the cephalic 

 face of the pseudobranch, some fibers penetrating that organ, 

 others supplying the sub-jacent mucosa. 



//. Jacobsoti s Anastomosis. 

 These fibers, like the last, are of fine caliber and are ob- 

 viously communis fibers. From the first sympathetic ganglion 

 they run directly back, as already indicated, close to the cran- 

 ium. The sympathetic commissure betweejn the facial to the 

 glossopharyngeal nerves runs back from the extreme caudal end 

 of the first sympathetic ganglion, independently of the fibers 

 of Jacobson's anastomosis and dorsally of them. The sympa- 

 thetic fibers are mainly non-meduUated, while those of Jacob- 

 son's anastomosis take the Weigert stain vividly. A little far- 

 ther back these two fiber bundles run close together accom- 

 panying a big blood vessel, the Jacobson's anastomosis dorsally, 

 but they do not fuse. The Jacobson's anastomosis runs into 

 the cephalic end of the IX ganglion ; the sympathetic commis- 

 sure runs along the inner face of this ganglion closely applied 



