316 journal of Comparative Neurology and Psychology. 



Strange" of Goronowitsch ('88, '96). The "System f' of this 

 author's descriptions comprises chiefly the ascending and descend- 

 ing secondary gustatory tracts. The descending fibers of the 

 spinal V and spinal (general cutaneous) vagus roots occupy the 

 most dorsal part of the cross-section of the dorso-lateral fasciculus. 

 This tract is very large and more heavily medullated than the 

 other fibers of this complex, so that its course can easily be separ- 

 ately followed to its termmus in the first accessory lobe of the spinal 

 cord. The more ventral bundles of this fasciculus in the oblon- 

 gata comprise tracts (probably mainly ascending) which pass 

 between the first accessory lobe and the adjacent formatio reticu- 

 laris alba and the funicular nucleus on the one hand and the for- 

 matio reticularis of the oblongata farther proximally, on the other 

 hand. There are other tracts in this fasciculus which pass be- 

 tween the oblongata and lower regions of the spinal cord, but 

 they are so confused with the shorter tracts that it is not possible 

 to follow them separately for their entire length. 



As the dorso-lateral fasciculus passes under the vagal lobe, it 

 receives on its ventral side the fine fibered ascending secondary 

 vagus tract in the way characteristic of teleosts in general ( Fig. 12). 

 Farther forward, at the level of the origin of the sensory IX root 

 (Fig. 13), the fasciculus becomes very compact and deeply em- 

 bedded in the substance of the oblongata under the massive tuber- 

 culum acusticum. Here the three chief elements mentioned 

 attain about equal proportions in the area of the cross-section of 

 the fasciculus, viz: the spinal V tract dorsally, the ascending 

 secondary gustatory tract ventrally and between them fibers of 

 the fasciculus lateralis of mixed character, probably mainly of the 

 fasciculus proprius type, putting the accessory lobes of the spinal 

 cord and the funicular nucleus into relation with the medulla 

 oblongata. The greater part of the latter fibers break up in the 

 formatio reticularis under the tuberculum acusticum. 



Tractus Cerebello-spinalis. — There is, however, one important 

 tract in the complex last mentioned, whose relations are more 

 clearly brought out in these sections than in those of any other 

 fish which I have examined. Its fibers are heavily medullated and 

 on the average of greater diameter than those of the spinal V tract, 

 with which they are closely associated. There is no possibility 

 of confusing them with the latter fibers, nor with any others of the 

 fasciculus lateralis complex, all of the remainder of these being 



