xxii LIST OF ILLUSTRATIONS 



Figure Page 



154. Baboon. Level of the superior colliculus 330 



155. Baboon. Level of the optic ehiasm 332 



156. Baboon. Level of the anterior commissure 333 



157. Dorsal surface of the gray matter of the brain stem, Papio cynocephalus (color) . 33" 



158. Lateral surface of the gray matter of the brain stem, Papio cynocephalus (color) . 339 



159. Ventral surface of the gray matter of the brain stem, Papio cynocephalus (color) . 341 



160. Macacus rhesus. Full-grown monkey and young 351 



161-164. Hand and foot of ALacacus rhesus 352,353 



165. Dorsal surface of brain of Macacus rhesus 358 



166. Base of brain of Macacus rhesus 359 



167. Left lateral surface of brain, Macacus rhesus 360 



168. Right lateral surface of brain, Macacus rhesus ■ 361 



169. Ventral surface of brain stem, Macacus rhesus 362 



170. Dorsal surface of brain stem, Macacus rhesus 363 



171. Macacus. Level of the pyramidal decussation 366 



172. Macacus. Level of caudal limit of dorsal sensory nuclei 36^ 



173. Macacus. Level of caudal limit of inferior olivary nucleus 369 



174. Macacus. Level through middle of inferior olivary nucleus 3~2 



175. ALicacus. Level of the vestibular nuclei 3"3 



176. Macacus. Level of the cerebellar nuclei 376 



177. Macacus. Level of the emergence of the sixth nerve 378 



178. Macacus. Level through the middle of the pons Varolii 381 



179. Macacus. Level of the emergence of the trochlear nerve 382 



180. Macacus. Level of the inferior colliculus 384 



181. Macacus. Level of the superior colliculus 386 



182. Macacus. Level of the optic chiasm 387 



183. Macacus. Level of the anterior commissure 388 



184. Ventral surface of gray matter of brain stem, Pithecus rhesus (co/or) 393 



185. Dorsal surface of gray matter of brain stem, Pithecus rhesus (co/or) 395 



186. Lateral surface of gray matter of brain stem, Pithecus rhesus (co/or) 397 



187. 188. Hylobates syndactylus (gibbon) 406,407 



189-192. Hand and foot of Hylobates syndactylus 408,409 



193. Dorsal surface of brain, Hylobates hoolock 414 



194. Base of brain, Hylobates hoolock 415 



195. Left lateral surface of brain, Hylobates hoolock 416 



196. Right lateral surface of brain, Hylobates hoolock 417 



197. Ventral surface of brain stem, Hylobates hoolock 418 



198. Dorsal surface of brain stem, Hylobates hoolock 419 



199. Gibbon. Level of the pyramidal decussation 422 



200. Gibbon. Level of the caudal extremity of the inferior olive 425 



201,202. Gibbon. Level through the middle of the inferior olive 428,429 



203. Gibbon. Level of the vestibular nuclei 43 1 



204. Gibbon. Lc\el of the cerebellar nuclei 433 



