974 



INDEX 



Smith, E. A., 627, 728, 745, 797, 829 



Smith, G. O., 813, 839 



Smith, J. H., 776 



Smith, J. P., 708 



Smoky quartz, 80 



Snakes, Cretaceous, 762 



Snow and ice, work of, 223 



Snowfield of Antarctica, 228 



Snowfield of Greenland, 228 



Snowfields, 227 



Snowflakes, 276 



growth of, 275 

 Snow-line, 229 

 Soapstone, 50, 81, 87 

 Sodium in igneous rocks, 23 

 Solarium trilineatum, 826 

 Solenhofen limestone, 709 

 Solution by ground-water, 72 



deposition from, 205 

 South Africa, glacial beds of, 667 

 South America, Carboniferous in, 

 643 



coal in, 643 



Cretaceous in, 758 



Devonian in, 575 



Lower Cretaceous in, 737 



Miocene in, 817 



Permian glacial conglomerates of, 

 667 



Pleistocene life of, 922 



Pliocene mammals of, 842 



Tertiary in, 783, 817 

 South American mammals, 920 

 Southern California, Quaternary 



movements in, 913 

 Southern Interior coal-field, 626 

 Spatter-cone, 380 

 Spencer, A. C., 775 

 Spencer, J. C., 891, 893, 934 

 Sphenophyllales, Carboniferous, 647 

 Sphenophyllum longifolium, 647 

 Sphenopteris, 644 



splendens, 645 

 Spergen formation, 598 

 Spergen Hill brachiooods, 615 

 Spergen limestone, 563 

 Sphericity and deformation, 365 

 Sphaerexochus mirus, 553 

 Spiders, 654 

 Spiral nebula, 421 

 Spirifer acuminatus, 581 



arenosus, 578 



biplicatus, 608 



cameratus, 658 



increbescens, 614 



Spirifer continued 



logani, 610 



macropleurus, 576 



marionensis, 608 



murchisoni, 578 



niagarensis, 550 



pennatus, 585 



radiatus, 550 * 



striatus, 610 



suborbicularis, 610 

 Spiriferina kentuckiensis, 658 



spinosa, 6l4 

 Spirifers, 584 

 Spisula marylandica, 825 

 Spits, 312 

 Sponges, Cambrian, 500 



Ordovician, 533 



Osage, 610 



Silurian, 553 

 Spoonbill dinosaurs, 763 

 "Spouting horns," 306 

 Springs, 211 



deposits made by, 213, 900 

 Spy, men of, 844 

 Squaloraja polyspondyla, 717 

 Squamata, 765 

 Staked Plains of Texas, 661 

 Stalactites, 44, 87, 209 

 Stalagmites, 44, 87, 209 

 Stanton, T. W., 686, 733, 752, 795 

 Starfish, Ordovician, 530 



Pennsylvanian, 657 



Silurian, 548 



Staurocephalus murchisoni, 553 

 Steatite, 50, 81, 87 

 Stegocephalians, 652 

 Stegosaurs, 722 

 Stenotheca rugosa, 498 

 Sterculia mucronata, 760 

 Stereospondyli, 653 

 Stereosternum tumidum, 673 

 Stevenson, J. J., 621 

 Stock, -H. H., 624 

 Stone, G. H., 872, 873, 885, 917 

 Storrs, L. S., 751 

 "Stoss" side, 263 

 Strahan, A., 475, 492 

 Stratification, 394 

 Stratified drift, 855 



rock, 12 



Stratigraphy and paleontology, re- 

 lations of, 484 



Streptelasma corniculum, 531 

 Streptis grayi, 550 

 Striae, 253, 852 



