OF THE NERVUS OCTAVOS. 179 



ri. v. L. L. nucleus ventralis lemnisci lateralis. 



Mistakes are made in fig. 15 N. 3 where r. d. N. VII [ is found instead of 

 ol. inf., in fig. 15 N. 4 where f. praed. N. dors. N. VIII is found instead of n. 

 dors. N. VIII, and in fig. 15 N. 15 and N. 1C where N. VI is found instead 

 of N. IV. 



PLATE IX, X and XI. 



Fig. Ifi A N. A horizontal series of sections through the central 

 system of a rabbit, seventeen days after the removal of 

 the left labyrinth -|- section of the left nervus octavus. 

 The degenerate rootfibres are made visible with Marchi- 

 method. The sections fall in a more or less oblique 

 direction. The left side is touched in a more ventral 

 level than the right half. 



The drawings represent. 



PLATE IX. 

 Fig. 16 A a horizontal section at the level of the most superficial layer of thick 



fibres (the systema ) of the corpus trapezoides. 

 Fig. 16 B idem, through the ventral layer of small fibres (the stratum b] of 



the corpus trapezoides. 

 Fig. 16 c =: idem, through the not degenerate layer (the stratum c) of te systema 



ventrale nervi octayi. The degenerate intermediary system is touched. 

 Fig. 16 D idem, through the degenerate intermediary system of HELD. 

 Fig. 16 E idem, at the level where the facial nerve and more proximally the 



V th nerve leaves the medulla. 



PLATE X. 

 Fig. 16 F idem, touching the issuing root of the facial nerve (at the leftside) 



just dorsally from its nucleus and from the olivary bodies. 

 Fig. 16 G =. idem, falling through the ventral part of the nucleus motorius Nervi 



trigemini. 

 Fig. 16 H idem, touching the genii N. VII and the nucleus of the nervus 



abducens, at the entrance of the distal (lateral) octavus-root. 

 Fig. 16 i idem , at the level of the entrance of the proximal (medial) octavus-root. 



PLATE XL 

 Fig. 16 K i= idem, at the level of the dorsal nucleus, showing its innervation 



by the descending rootfibres. 



Fig. 16 L idem, at the level of the tuberculum acusticum. 

 Fig. 16 M rr: idem, through the inferior pedunculus cerebelli, at its union with 



the superior pedunculi cerebelli. 

 Fig. 16 N ~~ at the level of the nuclei tecti. 



O 



The abbreviations are like those in the preceeding drawings moreover there are. 



f. rtfl. = fasciculus retroflexus or MEYNEKT'S bundle, 

 n. med. th. =: nucleus medialis thalanii optici. 

 n. lat. th. =: nucleus lateralis thalami optici. 

 c. g. 1. corpus geniculatum laterale. 

 tr. opt. tractus opticus. 

 fimbr. forn. = fimbria fornicis. 



c. g. m. corpus geniculatum mediale. 

 f. ped. tr. n: tractus interpeduncularis transversus. 

 N. N. Ill rz nucleus nervi oculomotorii. 



12* 



