INDEX. 



'93 



Reptiles, culmination of, 493. 



range of, in time, 402, 

 572. 



rank of earliest, 396. 



first of, 298, 303. 



Carboniferous. 343, 350, 

 358. 



Carbonifenms, of Nova 

 Scotia, 345. 



Devonian, 298. 



Jurassic, in the Arctic, 

 73S. 



Subcarboniferous, 315. 



Triassic, 424, 436. 

 Resins, 69.$ 

 Retepora, 15S.$ 



iueepta, 210* 

 Retinite, 8S.§ 

 Retzia radians, 357. 



Yerneuilana, 314* 

 Rhabdocarpus, 356. 

 Rhinoceros, 423.$ 



Nebrascensis, 515, 519.* 



occidentalis, 515. 



tichorinus, 561, 577. 



Miocene, 529. 



in U. Missouri, 522. 

 Rhizopods, 67. 163.$* 748. 



first of, 216. 



Cretaceous, 472, 481.* 



Tertiary, 525. 



in green-sand, 216, 749. 



of bottom of ocean, 612, 

 664, 749. 

 Rhodea, 355. 

 Rhode Island, Carboniferous 



in. 324, 325. 

 Rhombifers, 279.$ 

 Ehone. sediment of, 643. 

 Rhyncholites, 15G.g 455.$ 

 Rhynchonella, ISS.'g 399. 



bidentata, 261. 



bisulcata, 213* 



capax, 245. 



cuneata. 240,* 261. 



increbescens, 213,* 220. 



neglecta, 242. 



nitida, 261. 



nobilis. 255. 



Osagensis, 371. 



plena. 210.* 



plicatella, 261. 



semiplicata, 255. 



spinosa, 464. 



sublepida, 262. 



ventricosa, 254 * 255. 



range of, in time, 495. 

 Rhynchonella? common in the 



Tertiary. 526. 

 Rhynchosaur, 501 .$ 

 Rhynchosaurus articeps, 436. 

 Rhynchospira aprinis, 261. 

 Rill-marks. 94.$* 665. 

 Ripidolite, 61.g 

 Ripple-marks, 94.$* 664. 



in Hamilton beds, v 282. 



in Portage and Chemung 

 groups, 288. 



in Potsdam beds, 176. 



in Subcarboniferous, 311. 

 River-systems, 22. 

 Rivers, action of, in making 

 valleys, 635. 



Rivers, erosion by, 635. 



force of, as related to ve- 

 locity, 635. 



formation and flow of,632. 



increase of, in the Post- 

 tertiary, 570. 



of the Palaeozoic, 388. 



small in Devonian, 300. 

 Rock City, 321. 

 Rock-making, conditions of, 



196. 

 Rocks, constituents of, 49.$ 



kinds of, 70.$ 



structure of, 71-g 



made by Rhizopods, 488, 

 678. 



of coral reefs, 617. 



sedimentary, formation 

 of, 678. 



volcanic, 690, 703. 

 Rocky Mts., Carboniferous in, 

 324. 



Cretaceous in, 469. 



Subcarboniferous in, 308. 



elevation of, 531. 



in Carboniferous Period, 

 365. 



in Palaeozoic, 388. 



in the Devonian, 300. 



section of, 17.* 

 Rodents, 423.$ 



range of, in time, 572. 

 Rogers, W. B. & H. D., on Ap- 

 palachian faults and 

 flexures, 403, 407, 720. 



H. D., on rocks of Penn- 

 sylvania, 379. 

 Restellaria Americana, 477.* 



velatus, 517. 

 Rotalia Baileyi, 311. 



Boucana, 164.* 



globulosa, 164.* 



lenticulina, 474. 



senaria, 474. 

 Roth-todt-liegende, 372. 

 Rudistes, 472.$ 

 Ruined City, 321. 

 Ruminants, 422.$ 



range of, in time, 572. 

 Rupelian group, 523. 

 Russia, Carboniferous in, 353. 



Cretaceous in, 481. 



Devonian in, 295. 



Lower Silurian in, 207. 



Permian in, 372. 



Subcarboniferous in, 318. 



Triassic in, 433. 

 Rutiodon Carolinensis, 428.* 



Sabal, first of. 471. 

 Tertiary, 513. 

 Saccharoidal sandstone, 3S3. 

 Saccocoma pectinata, 458.* 

 Safford, on rocks of Tennessee, 



3S4, 509. 

 Sagenaria Chemungensis, 290. 

 Sahara, Desert of, 47. 

 Sahlite, 60.§ 

 St. Helen's group, 522. 

 St. Lawrence River, in the 

 Carboniferous, 365. 

 River, in the Devonian, 

 300. 



St. Lawrence River-system, 



22. 

 St. Louis limestone, 307. 

 St. Peter's sandstone, 175, 205. 

 St. Pierre group. See Pierre. 

 Salamandroids, 344.? 

 Saliferous epoch, 246. 



rocks, how formed, 249, 

 250. 



beds. Triassic, of Europe, 

 433. 

 Salina period, 246. 



salt-wells. 248. 

 Salisburia, 337.$ 

 Salix, first of, 471. 



Meekii, 471.* 

 Salmon, 278.$ 

 Salt in England, 433. 

 Salt-works of France, 433. 



of Germany, 433. 



of Salina, &c, 248. 

 Salt-group, Onondaga, 246. 

 Salterella pulchella, 187. 



rugosa, 1S7. 

 Sand, 55, 74.$ 

 Sand-bars of coasts, 662. 

 Sand-drift structure, 93.$ 

 Sand-hills en sea-shores, 628. 

 Sand-scratches, 631* 

 Sandrock, calcareous, 73.$ 

 Sandstone, 55, 70, 73.$ 



origin of, 377. 

 Sandy Hook, formation of, 



664. 

 | Sandwich Islands. See Ha- 

 WAIAN. 

 Sao hirsuta, 194* 

 Sapphirina Iris, 153.* 

 Saratoga Springs, 219. 

 Sargasso Sea, 658. 

 Sassafras Cretaceum, 471.* 

 Saurians, 346.$ 



See Reptiles. 

 Saurian coprolite, 457.* 

 Sauroids, 280.$ 

 Saurocephalus lanciformis, 



487. 

 Sauropus primaevus, 310, 315.* 

 Saxicava rugosa, 552. 

 Saxicava sand, 552. 

 Saxony, disturbances in, 412. 



Permian in, 372. 

 Scalaria Groenlandica, 552. 

 Scaldisian group, 523. 

 Scalent series, 379. 

 Scaglia, 4S0. 



Scalites ansrulatus, 210.* 

 Scaphites, 472.$ 



a?qualis, 487. 



Conradi, 473, 479* 



larvaeformis, 477,* 478,487. 



Warreni, 487. 

 Scapolite, 58.$ 



Scars of Conifers, 334,* 336* 

 Scelidotberium, 423,$ 566. 

 Schillerite, 82.$ 

 Schist, varieties of, 77.$ 81.$ 

 Schizodus Rossicus, 371. 



Schlotheimii, 375. 



last of, 376. 

 Schoharie grit, 269. 

 Schuylkill epoch, 309. 

 Scolecite, 62.$ 



