io8o 



INDEX 



cus of, relation of, to fore- 



;and, 429 

 'tion. 420 



in gorilla, 66 j 

 in lemur, i^ 

 in man. - 

 in marmot-:, i ^ 

 in mycetes. 215 



■41, 842 



in Pithecus rhesus, 369, 3-0, 3-1, 3-2, 393, 463 

 in tarsius, : 1 3 

 Bony capsule enclosing brain, susceptibility' of, to 



effects of cerebral growth, 862 

 Bony sjstem, as witness to evolutionan.- kinship, 

 in size and shape of skull, in skeleton of limbs, 10 

 Boule, 89- 



Boume method of reconstruction, -3 

 Bow and arrow, -60 



Brachium conjuncti^■um posticum in chimpanzee, 575 

 in lemur, 64 

 in man, 800 

 in marmoset, 177, 1-9 

 in Prthecus rhesus, 363 

 Brain, basal structures of, evolutional significance of, 

 illustrated by deflorescence of rhinen- 

 cephalon, 9"'0, 971 

 illustrated by increase in angulation in rela- 

 tions between optic tract and chiasm, 972 

 illustrated by orbital concavity, 969 

 and intcrorbital keel, 969 

 basal surface of, in gorilla, relation of optic 



nerves and tract to optic chiasm, 650 

 in chimpanzee, measurement and indices of, 566 

 convolutional and fissural pattern of, in chimpan- 

 zee, 568 

 in dog-headed baboon, 295 

 in gorilla, 647, 652 

 in orang, 493 

 in Pithecus rhesus, 357 

 in dog-headed baboon, 295-298 

 evolution, metric evidence of, 887, 922-923, 950- 



952 

 of gibbon, 413-456 



compared with baboon, 414 

 measurements and indices of, 412, 41 j 

 of gorilla, measurements and indices of, 644 

 gj'rencephalic, of orang, 493 



human, advance in, toward neokinetic control, 797 

 convolutional complexity of, as compared with 



simian simplicity, 789 

 features of, showing greatest evolutional 

 significance, 886, 954 



Pages 1-474 are in Volume I, 



Brain, human, lobation of, comparison of, — S-781, 

 -84, -85 

 with that of anthropoids, — 8. -Si. -82. -S3. 



784, 9+5-94" 

 motor areas of, extension of, 882 

 neural specialization in temporal and parietal 



lobes, -90 

 olfactor\' sulcus, prominence of, 94- 

 orbital concavity in basal surface of, 790 

 progressive development of, 800, 948-991 

 surface expansion of, relation to neopallium, 795 



two main features of, ; — 8 

 t\"pe of lobation in hemispheres of orang, 493 

 ventromedian sulcus in, -95, 800, 804, 806, 808, 



849 



weight and indices of, in different races and 

 primates, 7~, "78, 950-952 



witness to evolution, 3, 11, 12, i", 18, 791, 800, 

 948 

 of lemur, 29-34 

 of marmoset, fissural pattern in, 15-, 158 



lobation in, 158-160 

 of mycetes, 191-242 



measurements and indices of, 201, 202 

 of orang, 492-544 



measurements and indices of, 492 

 of Pithecus rhesus, compared with that of baboon, 

 355-357 



convolutions and lobation of, 357 



surface of, 356 



tjTJe of, 355 

 primate, structural changes in, relation of, to 



behavior, 13, 18, 267 

 simian type of, in dog-headed baboon, 357 



in Pithecus rhesus, 357 

 surface in chimpanzee, resemblance to man, 567 

 of tarsius, 95-98 

 vertebrate, structural substratum of, exists in 



rudimentarj' form, 1032 

 volume of, in ape-man, Dawn man, and gorilla, 887 

 Brain stem, in chimpanzee, 571-607 

 in dog-headed baboon, 299-334 

 in gibbon, 417-446 



precision in markings on, 417 

 in gorilla, 653-683 



significance of caudal sections of, 662-663 

 human, comparison of, with that of gorilla, 800 



deliniteness of the markings, 795, 796 



internal structure of, 800, 

 in lemur, 34-71 

 in marmoset, 164, 183 190 

 pages 475 1 120 in Volume II. , 



