Kappers, Teleostean and Selachian Brain. 73 



decussation of the latter. These tracts seem to run on frontally 

 in the fasc. long, posterior, after having crossed in this fascicle. 

 But immediately behind them the crossed oblongata connection 

 begins, sending its fibers first to the motor column which lies in 

 front of the trio-eminus nucleus. I could follow this bundle 

 (Figs. Ixxxviii, Ixxxix), from the cerebellum into this nucleus 

 easily, crossing in the posterior longitudinal fasciculus, in which it 

 takes only a short course. 



Immediately following this are the cerebellar connections with 

 the motor trigeminus, abducens and facialis nuclei. It is very 

 probable that the group of fibers which go farther backward ter- 

 minate in the motor column of the m&dulla spinalis. We have 

 here a whole syst^ .1 of fibers passing for a longer or shorter dis- 

 tance in the dorsal bundle and going to the nuclei of the motor 

 nerves and which, therefore, I should prefer to call tr. cerebello- 

 motorius cruciatus, as this name better indicates the connection 

 forming this system than the name tr. vestibulo-nuclearis, given 

 to that part of it which has been discovered by Ramon y Cajal in 

 mammals as being the connection between Deiter's nucleus and 

 the nuclei of the eye-muscle nerves. 



After I had already finished my work I received Banchi's 

 description of the cerebellar connections, in which this author has 

 not only described this connection of the cerebellum with the fasc. 

 long, posterior, but has also found by Marchi experiments that it 

 degenerates after the destruction of the cerebellar lobe. He could 

 follow the fibers in the fasc. long, posterior frontally up to the 

 third nerve and caudally to the spinal cord, so that there can be 

 no doubt about the existence of this tract. A similar connection, 

 moreover, has also been found by Koppen in the reptiles. This 

 first part of the second group was not yet developed in my speci- 

 men of Lophius, as indicated above; on the other hand the second 

 part of the same group was present. This has still to be described 

 and I mention here merely that it is a similar motor connection for 

 the whole octavus region, the latter being an enormously developed 

 static center which, covered by the cerebellar crest, extends far 

 behind the cerebellum on the dorsal and lateral aspect of the 

 oblongata. 



The posterior part, however, of this static region is situated 

 more ventrally, laterally of the tr. descendens N. quinti. By this 

 peculiar downward extension of the octavus region its decussating 



