OF THE NERVUS OCTAVUS. 173 



nucl. DEIT. nucleus BETTERS. 

 Port. int. C. R. portio iuterna corporis restiformis or corpus juxta- 



restiforme. 

 Ar. ov. C. R. area ovalis corporis restiformis. 



Tub. ac. Tuberculum acusticum. 

 r. spin. N. V. radix spinalis 



f. gel. N. V. formatio gelatinosa radicis spinalis i 



n. ol. sup. nucleus olivaris superior, 

 n. par. ol. sup. ~ nucleus para-olivaris superior, 

 n. trap. nucleus trapezoides. 



N. VI Nervus abducens. 

 nucl. N. VI = nucleus Nervi abducentis. 



str. ventr. a. ) - stratum ventrale a. ^ 



( c. trap. , , ( corporis trapezoides. 



str. dors. c. \ stratum dorsale c. \ 



str. 1. d. ~ stratum latero dorsale. 



str. 1. d. e. tub. ac. stratum iatero dorsale e tuberculo acustico. 



str. 1. d. e. n. ventr. stratum latero-dorsale e nucleo ventrale. 



Py. Pyramis. 



fasc. praed. fasciculus praedorsalis. 



lemn. med. r= lemniscus medialis. 



PLATE III. 



Frontal sections through the medulla oblongata of a 

 rabbit, one year after the removal of the right labyrinth, 

 with octav us-section in the young born animal. 



In fig. 3 A. A frontal section through the right (atrophied) tuber- 

 culum acusticurn is drawed at the entrance of the dorsal 

 root. (Preparation of WEIGERT-PAL). 



In fig. 3 B. The corresponding frontal section through the left 

 (normal) tuberculum acusticum at the same level. (Pre- 

 paration as in fig. 3 A). 



In fig. 13 A. The frontal section through the right nucleus of 

 DEITERS. (Preparation with picro-carminas ammoniac). 



In fig. 13B. The frontal section through the left nucleus of DEITERS 

 (Preparation as in fig. 13 A). 



N. Dors. N. VIII. nucleus dorsalis N. octavi. 



Port. int. C. R. corpus juxtarestiforme or portio interna corporis 



restiformis. 



str. med. sup. Tub. ac. stratum medullare superficiale tuberculi acustici. 

 str. med. prof. Tub. ac. stratum medulare profundum tuberculi acustici. 

 str. 1. d. stratum latero-dorsale corporis restiformis. 



R. lat. N. VIII | 



-rrr-rr \ rr radix laterahs (dorsalis) N, octavi. 

 R. dors. N. VIII ' 



R. Spin N. V. radix spinalis N. quinti. 

 N. ventr. N. VIII ~ nucleus ventralis N. octavi. 



Nucl. N. VII nucleus N. septimi. 

 A. R. Ov. C. R. = Area ovalis corporis restiformis. 

 H. fasc. interm. N. VIII HELD'S intermedial systema N. octavi. 



