INDEX 



1 1 1 1 



Shepherd on ehimpanzec, 546 



on Maeaeiis rhesus, 354 

 Sight. See Vision. 

 Silent area. See Frontal lobe, ~8ij 

 Simia Satyrus. See Orang-outang. 

 Simian characters, introduced by new world 



monkeys, 16 

 SIniian fissure in ciiiinpanzee, 76S, ^(n) 

 in gibbon, 412 

 in gorilla, 645 

 in human brain, 5~o 



position of parieto-occipital, 64, 

 in orang-outang, 493, 494, 495 

 Simiidac, family of, 2:, 478, 706 

 modern forms of, 477, 478 

 origin of, 731, 732 

 structural evolution of olive in, 703 

 Simultaneous movements of head, eye and h.ind, 

 '3. 2'", 35, 112, 168, 216, 2i(). 24Q, 251, 254, 2H4 

 in chimpanzee, 555, 582 

 in gibbon, 460, 705 



advance in, 430, 459, 705 

 in gorilla, 656, 665 



relation of, to structural expansion of inferior 

 olivary nucleus, 656, 667, 704 

 in orang, 512 



relation of, to inferior olive, 249, 284, 300 

 Si\th cranial nerve. See Abducens nerve. 

 Skilled acts, adjustment of sinuiltancous movements 

 in, 13, 27, 36, 37, 168 

 automatic control of, in marmoset, 168 

 in tarsius, 105 



illustrated bj' catching insects on wing, 112 

 relation of, to absence of retinal macule, 1 12 

 to decussation of fibers, 1 1 2 

 of chimpanzee, 582, 590, ^93 



comparison of baboon with macacus, 4^8, 460, 466 

 of gibbon, 430, 460 

 of gorilla, 665, 666, 676 

 of lemur, 35, 41, 42, 47, j6, 58, 59 

 of marmoset, 164, 166, 168 

 of mycetes, 210, 283 

 of orang, 499, 510, 511 

 relation of, to cerebellar nuclei, 377 



to connection between cerebral cortex and 



lateral lobes of cerebellum, 593 

 to cortex of cerebrum, 65, 272 

 to differentiation of hand, 210, 282, 665 

 to inferior olive, 35, 47, 168, 219, 249, 300, O65 

 to kinesthetic sensibility, 272 

 to locomotion, 276, 665 



Pages 1-474 are in Volume I, 



Skilled acts, relation of, to ocular advance, 130, 250, 

 281, 282 

 to oculomotor decussation, 282 

 to pontile nuclei, 56, 59, 382, 820 

 to size of cerebral peduncles, 127, 129, 131 



of pons Varolii in marmoset, 162 

 to superior cerebellar peduncle, 822 

 of tarsius, ro,, 1 10-112, 120, 12" 

 tw'o simultaneous streams of innervation, 2~I 

 Skilled manu.'il acts, 282 

 Skilled movement, relation of, to occipital lobe, 795 



to temporal lobe, 795 

 Sloth, 260 

 Smith, G. Mlliolt, 90, ()i, 88~, ()ii, 917, 945, 954, 



960, 963 

 Sollas, 886 

 Solutrean Period, 761, 762 



relation of, to Hint industry, 918, 931 

 Somatic variants in primate organization, 879 

 Somesthetic sensibility, 790, 797 



expansions in, in parietal lobe, relation of, to 

 quadrunianal dillerentiation, 944, 951 

 Sonntag on position of tarsius, (>4 

 Spearhead, 753, 758 



Special senses, evolutional significance of, 984-986 

 Specialization in human race, factors of, 883, 884 

 in mammals, structures essential to, 1001, 1025, 



1039 

 in primates, common factors of, -25, 994, 1040 

 Speech, in ape-man of Java, 883 

 in Dawn man, 888 

 in Neanderthal man, 903 

 relation of, to hand, 214 

 to hearing, 883 



to inferior frontal convolution, 883 

 to prefrontal area, 935 

 in Rhodesian man, 915, 916 

 Speech center, motor, position of, in luiman brain, 



786, 883 

 Spider monkey, 203, 213, 303. See also Ateles ater. 

 Spinal accessorj' nerve in gorilla, 658 



in tarsius, 103, 109 

 Spinal cord, 269 



high cervical level of, in chimpanzee, 6o(), 61 1 

 in gorilla, 685, 696 

 in orang, 533 



in Pithecus rhesus, 391, 402 

 resemblances to human cord, 533, 609 

 Spinocerebellar eminence in human, 796 

 in orang, 498, 506, 507 

 progressive distinction of, 507 

 pages 475 1 1 20 in Volume II, 



