Skew distribution, see under Capacity, 

 endocranial 



Social organization, 116, 144 



Sollas, W. J., 66, 162 



Sorex minutus, 107 



Space, subarachnoid, 8 



Spann, W., 108, 162 



Speciation in Hominidae, 146 



Spence, T. F., 15, 20, 26, 33, 36-43, 

 46, 69-71, 153 



Spinal cord, weight of, 106 



Squirrel monkey, see Saimiri 



Standard deviations, see under Capac- 

 ity, endocranial, variability of 



Steatopygia, 147 



Stegosaurus, 107 



Stephan, H., vii-viii, 153, 162 



Stereoscopic vision, 125 



Sterkfontein, 3, 8-9, 16-17, 73> 111 - 

 126, 130-31, 134 



Stillman, C. K., 10, 162 



Strandloper, 100-1 



Suradi, T., 88-89, l6 2 



Sutures, on endocasts, 6, 8 



Swartkrans, 21-24, 99, 126, 132, 134- 



36 

 Symbolic communication, see under 



Communication 

 Symphalangus syndactylus, 32-33, 35, 



40, 42, 46-47, 52-53, 83 



Taforalt, 100 



Tamarin, see Leontocebus 



Tarahumara, 139 



Taung, 2, 12-15, 66, 111, 130-31 



Teeth: of Australopithecus, 125, 143; 



of Mio-pliocene hominids, 133 

 Telanthropus, see Homo species of 



Swartkrans 

 Ternifine, 5, 134 

 Thurber, J., 152, 162 

 Tobias, P. V., 4-5, 10, 12, 15-16, 18, 



20, 22, 24-28, 38-39, 43, 50, 56, 60- 



62, 67, 72, 75-76, 81, 83, 87-88, 90, 



93, 108, 112, 117, 124-26, 132, 134- 



36, 140, 144, 147, 159, 162-63 

 Todd, T. W., 9-10, 164 

 Tool-making, see under Implemental 



activities 

 Tools: of bone, horn, and tooth 



(osteodontokeratics), 116, 127-34, 



136-38; of stone, 133-38 

 Tool-using, see under Implemental 



activities 

 Tower, D. B., 104, 164 

 Tree shrew, see Tupaia 

 Trinil, 65-67, 81-86, 90; new estimate 



of endocranial capacity, 83-87 

 Trotter, W. R., 152, 164 

 Tupaia jarianica, 107 



Upright posture, 126, 133, 143-45, '47 



Vallois, H. V., 28, 32, 36, 38-39, 43, 

 45-46, 50-51, 53, 57, 87, 91, 154, 

 164 



Vertesszollos, 6, 138 



Vevers, G. M., 117, 164 



Vlcek, E., 105, 164 



Voigt, J., 107, 160 



Wallace, A. R., 147 



Wanke, A., 153 



Washburn, S. L., 142-44, 164 



Weidenreich, F., 26, 40, 66, 83, 85, 87, 



89-90, 100, 164 

 Weiner, J. S., 117-18, 164 

 Weinert, H., 83, 87, 164 

 Whale, see Physeter 

 Wiebes, J. T., 83 

 Woo, J. K., 90-91, 164 



Yerkes, R. M., 118, 164 



Zinjanthropus, see Australopithecus 



boisei 

 Zuckerman, S., vii, 4, 10, 13-15, 26, 33, 



36, 42-43, 45-4 6 . 7°. H*> 155' l6 4 



>i 170 



