690 



INDEX. 



Pteropods, Cambrian, 298 



Chemung, 478 



Devonian, 473 



Mississippian, 523 



Silurian, 407 

 Pterotocrinus birurcatus, 532 

 Pterygometopus callicephalus, 



349 

 Pterygotus, 412 



Devonian, 490 

 Ptilophyton, 494 

 Ptychopana, 299 



antiqua, 299 



kingi, 298, 299 

 Pugnax uta, 616, 617 

 Pulaski shale, 559 

 Pumpelly, R., cited, 198 

 Pupa vermilionensis, 611 

 Putnam, G. R. (and Gilbert), 

 cited, 236 



Quadrant quartzite, 153 

 Quinnimont shale, 559 

 Quinnissec series, 142, 160 



Radioactive matter, lumines- 

 cent properties of, 59 



substances, 52 

 Rafinesquina alternata, 356 

 Raleigh sandstone, 559 

 Ramsay, A. C, cited, 588, 627 

 Randville dolomite, 179. 180 

 Ransome, F. L., cited, 436 

 Raphistomina lapicida, 353 

 Reagan, A. B., cited, 390 

 Receptaculites occidentalis, 363 



Silurian, 408 

 Red Beds, 621, 624 

 Redlich, K. A., cited, 272 

 Reef-building corals, 463 

 Renault, B., cited, 493, 591 

 Rensse/sena, 456, 459 



aequiradiata, 455 



ovoides, 458 

 Reptiles, Permian, 647 

 Reteograptus eucharis, 362 

 Reticularia pseudolineata, 525 

 Retrograde rotation, 70 

 Reusch, H., cited, 159, 272 

 Rhabdophora, 345 

 Rhipidomella burlingtonensis, 

 525 



oblata, 455 



pecosi, 616, 617 



vanuxemi, 471 

 Rhizodus, 614 

 Rhynchonella, 472 



eurekensis, 530, 532 

 Rhynchotrema capax, 356 



cuneata, 403, 409 

 Rhytimya radiata, 354 

 Richardson, G. B., cited, 308, 582 

 Richmond beds, 310 

 Richthofen, F. von, cited, 159, 



272, 300, 590 

 Rift valleys, 131 

 Rings of Saturn, origin of, 63 



revolution of, 63 

 Rise of lava, 103 



arrest of, 104 



Ritchey, G. W., cited, 44. 45, 46, 



49 

 Roche, E., cited, 22, 34 

 Roche limit, 34 

 Rochester shale, 370, 377 

 Rockcastle conglomerate lentil, 



560 

 Rogers, A. W., cited, 635 

 Rominger, C, cited, 280 

 Rondout water-lime, 370 

 Rotary motion, origin ot, 56 

 Rothhegende, 626 

 Rove slate, 190 

 Rubens, cited, 671 



St. Croix series, 219 



St. Genevieve formation, 500 



limestone, 561 

 St. John, O. H., cited, 534 

 St. Lawrence embayment, 450 



Onondagan, 468 

 St. Louis fauna, 529 



formation, 500, 502 



limestone, 561 



series, 561 

 Salina beds, 370 



epoch, aridity of, 388 



series, 370, 386 

 Salt, Mississippian, 500 



occurrence of, 517, 518 



Permian, 628 



Salina series, 387 



Siberia, 342 

 Salter, J. W., cited, 280 

 Salts of Stassfurt, 630 

 Sandstone, crushing strength of, 



127 

 Saportea, 643 



salisburioides, 643 

 Saratogan series, 219 

 Sardeson, P. W., cited, 302, 357 

 Sarle, C. J., cited, 376 

 Satellites of Neptune, 71 



of Uranus, revolution of , 71 

 Sauropterygia , 649 

 Sauropus, Mississippian, 537 

 Sawatch quartzite, 154 

 Schist series of Archean, 142 

 Schizocrania filosa, 356 

 Schizodus chesterensis, 533 



wheeler i, 616 

 Schizolopha textilis, 353 

 Schizoneura, 646 



gondwanensis, 645 

 Schizophoria multistriata, 455 



striatula, 475. 476 



swallovi, 525 

 Schizotreta fissus, 356 



ovalis, 356 

 Schloesing, cited, 666 

 Schoharie grit, 424 

 Schrader, F., cited, 436 

 Schuchert, C, cited, 221, 225, 

 391, 458 (and Clarke), 310, 

 370, 420 (and Ulrich), 250, 

 312, 321, 344, 4". 427, 432 

 Schwarz, E. H. L., cited, 273, 



448, 636 

 Scorpions, Carboniferous, 611 



Devonian, 490, 495 



Scorpions, first appearance of» 



4i5 

 Scotland, overthrust in, 341 

 Scott, D. H., cited, 493. 595. 596 



601 

 Scott, W. B., cited, 294 

 Scudder, S. H., cited, 494, 610 

 Sections of the Huronian, 179 



of Ordovician in interior, 319 

 Secular changes of temperature 



and Q0 2 of ocean, 668 

 Sederholm, J. J., cited, 159, 215 

 Sedimentary eon, 91 

 Sedimentation and continental 

 creep, 132 



Cambrian, 246 



Ordovician, 304 

 Seeley, H. M. (and Brainard, 



E.) v cited, 364 

 Selective fusion, 102 

 Seminula, 531 



argentea, 616, 617 



subquadrata, 532 

 Senecan series, 432 

 Sevier shale, 316 

 Seward, cited, 598 

 Sewell formation, 559 

 Shaler, JN. S., cited, 544, 549 

 Sharks, Devonian, 461, 469, 489 



Mississippian, 535 

 Sharon conglomerate, 557 

 Shawangunk formation, 372 



grit, 370 



mountains, 371 

 Shear zone, subcrustal, 126 

 Shepard, E. M., cited, 424 

 Sherzer, W. H., cited, 424 

 Shumard, B. F., 561 

 Siamo slate, 150, 179 

 Siberia, Ordovician of, 342 

 Siebenthal, C. E., cited, 54 

 Sigillana, Pennsyivaman, 598 

 599. 603 



Devonian, 493 



Mississippian, 537 



Permian, 642 

 Silurian blastoidea, 400, 403 



brachiopoda, 401, 403 



bryozoa, 405, 406 



cephalopoda, 403, 405 



ceratiocands, 408 



chain coral, 407 



climate, 396 



close of. 395 



coral development, 407 



coral reefs, 407 



corals, 406 



crinoids, 400, 403 



crustaceans, 408 



cystoids, 401, 403 



echinoderms, 400 



echinoids, 401 



fishes, 409, 417 



foreign, 395 



gastropods, 403, 406 



graptolites, 408 



halysites, 407 



life, 396 



marine plants, 409 



ostracodes, 408 



