INDEX. 



795 



Reptiles, culmination of, 49S. 



range of, in time, 402, 

 572. 



rank of earliest, 396. 



first of, 238, 303. 



Carboniferous, 343, 350, 

 358. 



Carboniferous, of Nova 

 Scotia, 345. 



Devonian, 298. 



Jurassic, in tbe Arctic, 

 738. 



Subcarboniferous, 315. 



Triassic, 424, 436. 

 Resins, 69.$ 

 Retepora, ioS.g 



incepta, 210* 

 Retinite, 88.$ 

 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. 

 Rbodea, 355. 

 Rhode Island, Carboniferous 



in, 324, 325. 

 Rhombifers, 279.$ 

 Rhone, sediment of, 643. 

 Rhyncholites, 156.$ 455.$ 

 Rhynchonella, 183,$ 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, 435. 

 Rhynchonella; common in the 



Tertiary, 526. 

 Rhynchosaur, 501.$ 

 Rhynchosaurus articeps, 436. 

 Rhynchospira aprinis, 261. 

 Kill-marks, 9Vf 665. 

 Kipidolite, 61.$ 

 Ripple-marks, 94,$* 664. 



in Hamilton beds, 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, 30S. 



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. 

 Rostellaria 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, 383. 

 Saccocoma pectinata, 458.* 

 Safford, on rocks of Tennessee, 



384, 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 formefl, 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 Prance, 433. 



of Germany, 433. 



of Salina, &c, 248. 

 Salt-group, Onondaga, 246. 

 Salterella pulchella, 187. 



rugosa, 187. 

 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, 340.$ 



See Reptiles. 

 Saurian coprolite, 457.* 

 Sauroids, 280.$ 

 Saurocephalus lanciformis, 



487. 

 Sauropus primaavus, 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, 480. 



Scalites angulatus, 210.* 

 Scapharca, 522. 

 Scaphites, 472.$ 



aequalis, 487. 



Conradi, 473, 479* 



larvaeformis, 477,* 478,487. 



"Warreni, 487. 

 Scapolite, 58.$ 



Scars of Conifers, 334,* 336* 

 Scelidotherium, 423,$ 566. 

 Schist, varieties of, 77,$ 81.$ 

 Schizodus Rossicus, 371. 



Schlotheimii, 375. 



last of, 376. 

 Schoharie grit, 269. 

 Schuylkill epoch, 309. 

 Scolecite, 62.$ 



