xii LIST OF ILLUSTRATIONS 



TiGURE Pace 



256. Chimpanzee. Level of the pyramidal decussation 577 



2y~. Chimpanzee. Level of caudal extremity of inferior oIi\e 579' 



258. Chimpanzee. Level through the middle of the inferior olive 581 



259. Chimpanzee. Level of the vestibular nuclei 584 



260-262. Chimpanzee. Level of the cerebellar nuclei 58-^, 588, 589 



263. Chimpanzee. Level of caudal limit of pons, showing emergent sixth nerve fibers 593 



264. Level through pons, showing emerging sixth nerve fibers 594 



265. Chimpanzee. Level through the middle of the pons Varolii 596 



266. Chimpanzee. Level of the emergence of the fourth ner\ e 597 



267. Chimpanzee. Level of the inferior colliculus 598 



268. Chimpanzee. Level of the superior colliculus 602 



269. Chimpanzee. Level of the lateral geniculate body 604 



270. Chimpanzee. Level of the optic chiasm 606 



271. Chimpanzee. Level of the anterior commissure 60"" 



272. Ventral surface of gray matter of brain stem, Troglodytes niger (co/or) 611 



273. Dorsal surface of gray matter of brain stem. Troglodytes niger (color) 613 



274. Lateral surface of gray matter of brain stem. Troglodytes niger (color) 615 



275. Gorilla group 624 



276. Large male gorilla killid in the African Congo 625 



277. Gorilla gorilla 62" 



278. Bronze statue of gorilla and woman 628 



279. John Daniel in an amiable attitude ". . 629 



280. Six-year-old gorilla, John Daniel 633 



281. Cast of gorilla taken in last hunt of Mr. Carl Akeley 634 



282. Young gorilla, John Daniel, showing breast-beating act 636 



283. Adult male gorilla 639 



284-287. Casts of hand and foot of the gorilla, John Daniel 640, 641 



288, 289. Casts of hand and foot of an adult male gorilla 642 



290, 291. Casts of the hand and foot of the gorilla, John Daniel 643 



292A and B. Dorsal surface of brain, gorilla 646, 647 



293A and B. Base of brain, gorilla 648, 649 



294A and B. Left hemisphere of brain, gorilla 650, 651 



295. Ventral surface of brain stem, gorilla 654 



296. Dorsal surface of brain stem, gorilla 655 



297. Gorilla. Level of the pyramidal decussation . . 658 



298. Gorilla. Level of the dorsal sensory nuclei 659 



299. Gorilla. Level of caudal extremity of inferior olive 661 



300. Gorilla. Level of the middle of the inferior olive 664 



301,302. Gorilla. Level of the vestibular nuclei 668,669 



303,304. Gorilla. Level of the cerebellar nuclei 6-0,671 



305. Gorilla. Level of the emergence of the sixth cranial nerve 6-3 



306. Gorilla. Level through the middle of the pons Varolii 675 



30". Gorilla. Level of the emergence of the trochlear ncr\e 6 — 



