1094 



INDEX 



Hypoglossal 'nerve in orang, 512, •513 



in Pitliccus rhesus, 370, 3~i, 3-2, 403 



in tarsius, ()(), 108 

 Hypoglossal nucleus in chimpanzee, 5^4, 582-585,621 



in dog-headed baboon, 303, 312, 313 



in gibbon, 427-429 



in gorilla, 662, 663, 664 



in lemur, 40-48, 49, 84 



in man, 798, 810, 857 



in marmoset 169, 186 



in myccles, 217-220, 236 



in orang, 514 



in Pitheeus rhesus, 372 



in tarsius, 109 



not discrete, i oS, 111-115 

 Hyrax, 955 



TMPRESSIONKS digitutae, 863 



Indrisinae, 980 



Interior brachium in chimpanzee', 616 

 in dog-headed baboon. 540. 344 

 in gorilla, 692, 695 

 in lemur, 78 

 in man, 848, 854 

 Inferior collicular commissure, in chimpanzee, (100, 

 620 

 in dog-headed baboon, 345 

 in gorilla, 679, 695 

 in niycetes, 240 

 in Pitheeus rhesus, 402 

 Inferior colliculi, in chimpanzee, 575, 616 



index of rellex response to sound, 575, 599, 620 

 coefTicients of, in higher anthropoids, 721 

 in intermediate primates, 470 



comparison of, with those of lower primates, 



470 

 relation of, to hearing, 470, 525 

 in dog-headed baboon, 301, 304, 325-328, 337, 

 339. 340, 344 

 significance of size in, 328 

 structure of, 328 

 function of, 174, 469, 523, 525 

 in gibbon, 419, 420, 439, 454, 469 



superseded by .auditory area of cerebral cortex, 

 469 

 in gorilla, 652, 656, 657, 676, 677, 679, 690, 691, 



694, 695 720, 721 

 in great apes, comparison of, with those In 

 intermediate primates, 721 

 with those in lower primates, 721 



Pages 1-474 are in Volume I, 



Inferior colliculi, in higher vertebrates, 328 

 illustrated by tarsius, 125 

 in lemur, 39, 62, 63, 77, 78, 79, 81, 83 

 in lower vertebrates, 328 

 in man, 800, 827, 830, 837, 847, 848, 854 



as index of complete telenccphelization, 830 



involution in, 827, 830, 858 

 in marmoset, 163, 164, 1-3, 174, i"5, 179, 187, 



189, 190 

 in niycetes, 209, 225-22-, 23^, 240, 241 

 in orang, 523, 525, 541 



structure of, 525 

 in Pitheeus rhesus, 363, 383-386, 398-402 



significance of structure in, 383 

 relation of, to auditory sense, 63, 1-3, 1-4, 225, 

 227, 277, 327, 469, 523, 525, 599, -21 



to balancing, 261 



to temporal lobe, 599, 721 

 in tarsius, 100, tot, 120, 122-12-, 135-151 

 Inferior fovea vagi, in human, 80 

 Inferior frontal convolution in human brain, 786, 935 

 Inferior frontal sulcus, later position indicated in 



lemur, 30 

 Inferior medullary velum in lemur, 83 

 Inferior olivary eminences, in tarsius, size of, 99 

 Inferior olivary nucleus in chimpanzee, 583, 591 



resemblance to human, 578-582, 586, 612-614 

 cocllicients of, 254 



comparison of, in lemur and great apes, 70; 

 connections of, 248, 1032 

 definition of, 510 

 description ol', 252 



in dog-headed baboon, 299, 300, 310-316, 335-341 

 evolutional unfolding of, 705, 1032 

 expansion of, as index of neokinetic progress, 



725. 1033 

 function of, 247, 24S, 249, 253, 1030, 1032 

 in gibbon, 418, 424-432, 447-449 



comparison with baboon, macaque, 421, 460 



prominence of, 448, 460, 705 

 in gorilla, 654-665, 687-689 



significance as to coordinative control, 703, 704 



size and structure of, 656, 665, 66-7 

 in higher anthropoids, coeHicients of, 704 

 in lemur, reconstruction of, 34, 38, 45, 46, 4", 48, 



49. 73. 75. 79 

 in man, 806, 808, 814, 837, 842, 843, 844, 849 

 accessory elements of, 808, 814, 842 

 compared with lemur, 809, 810 

 evolution of, 252, 809, 810, 838, 839 

 fundus of, 814, 843, 849 

 pages 475 1 120 in Volume II. 



