690 



INDEX 



Roots of teeth, 95 



Rootless teeth, 96 



Rosebud stage, 120, 235 , 



Ruminants, 81, 84, 87, 281, 

 373, 651 ; hollow-horned, 

 328; Miocene, 232 ; true, 

 54, 201, 362, 387, 402, 

 409, 446 



Russell, I. C, 589 



Sables, 141 



tSabre-tooth, 32; cat, 252 

 (restoration) ; cats, 659 ; 

 false, 542 (skull fig.); 

 primitive, 539 (restor.) ; 

 Tiger, frontispiece 



(restor.), 195 (restor.), 

 617, 531 (skull fig.), 534 

 (do.), 536 (restor.); 

 tigers, 54, 210, 530, 552; 

 Miocene, 229, 234, 534; 

 Oligoeene, 535; Pleisto- 

 cene, 204; Pleisto., S. 

 Amer., 211; Pliocene, 

 223 



-fSabre-tooths, 265, 650 ; 

 false, 249, 541 ; John 

 Day, 249, 535, 541, 542 ; 

 Miocene, 238 ; White 

 River, 254. (See also fMa- 

 chairodontinse) 



Sacramento Valley, Mio- 

 cene, 118 



Sacrum, 73 (fig.) 



fSadypus, 592 



Sagittal crest, 63 



Saiga, 65 



Saiga Antelope, 65 



St. Elias Alps, 101 



St. Lawrence Valley, in- 

 vasion of, by sea, 133 



Sakis, 578, 685 



Saline water, 34 



Salisbury, R. D., 130 



Salt Lake, Utah, 131 



Salt lakes, 24 



Sand, wind-blown, 33 



Santa Cruz age and stage, 

 20, 30, 124, 262, 263, 264, 

 282, 283, 467, 470, 473, 

 474, 475, 477, 479, 481, 

 482, 485, 493, 499, 500, 

 501, 504, 508-512, 586, 

 587 ; mammals, 243 (res- 

 torations) 



Santa Cruz Mts., Calif., 118 



Santa Cruz River, as 

 barrier to armadillos, 139 



Sapajou, 584 (fig.) 



SarcophUus, 634 



Sabmiento, 143 



fScalibrinitherium, 489, 493 

 495, 496 (skull fig.), 497 

 (do.) 



Scalops, 163 



Scalpriform teeth, 96 (fig.) 



Scapanus, 163 



Scaphoid, 83 



Scapho-lunar, 83 



Scapula, 76 (fig.) 

 fScdidotherium, 592, 601, 



602, 604 

 fSchismotherium, 592 

 iSchizbtherium, 291, 357 

 SCHLOSSER, M., 262, 380, 



514, 555, 583, 625, 661 



SCHUCHERT, C, 105, 114, 



119, 126 

 fScmravus; 280 

 Sciuromorpha, 270 

 Sciuropterus, 164 

 Sciurus, 164 (fig.) 

 ■fSclerocalyptus, 219, 592, 



618, 620 

 Scleropleura, 592, 611 

 Scott, D. H., 288 

 Sea-Cow, 60, 207, 442 

 Sea-Otter, 517, 518 

 Seals, 1, 2, 3, 37, 56, 59; 



Pleistocene, 132 

 Seas, barriers to land 



mamnials, 139 

 Section, geological, 7, 9 



(diagram) 

 Sedimentary rocks, 6 

 Sediments, 6 

 Selenodont tooth, 360 (fig.) ; 



origin of, 651 

 Sewellel, 153, 233 

 Sewellels, 249; Miocene, 238 

 Shales, Florissant, 129 ; 



Green River, 109 

 Sheep, 54, 60, 93, 362, 409, 



416, 418, 419, 420; 



Rocky Mt., 152, 419 

 Shells, fossil, 662 

 Sheridan stage, 33, 131, 133, 



200 

 Shrews, 59, 141, 173, 191; 



American, 163 ; jump- 

 ing, 59 ; Old World, 152 ; 



Siberia, 197, 207, 332, 350, 

 426 ; frozen carcasses in, 

 39 



Sierra Nevada, 101, 122, 

 150, 153; Miocene, 118; 

 Pleistocene glaciers, 131 



Sigmodon, 163 



Silurian period, 15 



Simiidffi, 583 



Simplioidentata, 60 



Sinclair, W. J., 107, 437 



■fSinopa, 565 (teeth fig.), 

 566 (do.), 633 



Sirenia, 60, 442 



Sitomys, 153, 164, 182 



Skeleton, 61 ; significance 

 of, 42 



Skull, 61 



Skunk, 163, 167 (fig.), 213, 

 517 ; Argentine, 174 

 (fig.); Little, 174 (fig.); 

 Spotted, 517 



Skunks, 153, 163, 174, 210, 

 518, 550, 551; Pleisto- 

 cene, 204 ; South Ameri- 

 can, 552 



Sloth, Three-toed, 186 (fig.) , 

 591; Two-toed, 74, 187 

 (fig.), 591 



Sloths, 2, 60, 97, 186, 189, 

 592 ; Araucanian, 226 ; 

 Pleistocene, 218 ; Santa 

 Cruz, 245 



fSmUodon, frontispiece 

 (restoration), 195 (do.), 

 204, 211, 517, 531 (skull 

 fig.), 532 (teeth fig.), 535, 

 536, 537, 544, 553, 622 



Smith, Perein, 23 



Smith, William, 7, 9 



Smith River stage, 121 



Snake Creek age and stage, 

 17, 127, 222, 388 



Snakes, 244 ; Paleocene, 

 284 



Solenodon, 173 (fig.) 



Solitary species, 38 



Sonoran region, 146, 147 

 (map), 152, 153, 161, 176, 

 178, 191, 363 



Sorex, 152 



South Africa, 14 ; Permian 

 glaciation, 25 ; Triassic 

 reptiles, 644 



South America, Eocene 

 separation from N. Amer. 

 104 ; Miocene junction 

 with N. Amer., 120 

 Permian glaciation, 25 

 Pleistocene Man, 589 

 zoological divisions, 173 

 (map) ; zoology, 146 



South Australia, dry lakes 

 of, 34 



South Shetland Islands, 124 



Sparnacian stage, 108 



Species, definition, 51 ; dis- 

 tribution, 136 ; origin, 20 



Specific area, 136 



Spermophilus, 163 (fig.), 164 



YSphenophalos, 362 



Spilogale, 174 (fig.), 517, 

 552 



Spiny rats. Pleistocene, 218 



Spdrts, 660 



Squirrel, Grey, 164 (fig.)^ 

 suborder, 270 



Squirrels, 2, 60, 245; fly- 

 ing, 164 ; John Day, 249 ; 

 Miocene, 229, 238 ; true, 

 164, 181; White River, 

 254 



Stag, 358 ; European, 151 ; 

 Thian Shan, 151 



tStag-Moose, 195 (restora- 

 tion), 208, 209 (restor.), 

 413 



Stage, geological, 15 



Stalagmite, 30 



Stations, 136 



^Stegodm, 430, 439 



tStegodonts, 438 



^Stegoiherium, 243 (restora- 

 tion), 480 (do.), 592, 614, 

 615 (skull fig.) 



