1 86 STRONG. [Vol. X. 



proceeds cephalad, and also gradually becomes further removed 

 from the median line. It finally passes out into the IX -|- X 

 by some 8 or lo rootlets, which break through the ascending 

 trigeminal tract to make their exit. It is here this fasciculus 

 attains its greatest dimensions. A small portion of it, how- 

 ever, continues cephalad, and emerges as the portio intermedia 

 Wrisbergii of the VII. It is accompanied as far as the exits 

 of the IX + X on its inner side by the *' sensory " nucleus of 

 the IX + X. The finer structure of this bundle is as follows: 

 it consists of the finest fibres with gray matter intermingled ; 

 the fibres both divide and give off collaterals which encircle 

 the nearest ganglion cells. 



It is evident, from the above brief resume of Kolliker's 



account, that the fasciculus communis corresponds with the 



fasciculus solitarius in every detail, and that the nucleus on the 



inner side of the former corresponds with the so-called sensory 



nucleus of the IX + X. 



Furthermore, inasmuch as the fasciculus solitarius is con- 

 tinued cephalad into the portio intermedia, it is evident that the 

 portio intermedia is represented in the tadpole by the fasciculus 

 communis root of the VII, the ganglion geniculi by the ganglion 

 of this root, fused in the tadpole with the ganglion Gasseri, but 

 separate in Amblystoma, and the chorda tympani by that portion 

 of the fasciculus communis which, on emerging from its gan- 

 glion, unites with the hyomandibularis VII, separates as the 

 R. mandibularis internus, and innervates portions of the floor 

 of the pharynx, especially that part, in the tadpole, near the 

 site of the future tongue. The R. mandibularis internus thus 

 corresponds, point by point, with the chorda tympani, having 

 the same character of fibres, the same internal origin, and the 

 same course and final termination. 



That the R. palatinus would correspond, in part at least, to 

 the R. superficialis major, would seem probable. One objec- 

 tion to this view, i.e.^ that the latter is a motor nerve to the 

 muscles of the palate, has been removed by Turner (63), who 

 has shown that probably the muscles of the soft palate derive 

 their motor supply from the pharyngeal plexus through the 

 pharyngeal branch of the Vagus. Another serious objection, 



