INDEX. 



795 



Sphenophyllum emargina- 

 tum, 342. 



Schlotheimii, 341.j| 

 Sphenopteridas, 338.g 

 Sphenopteris, 355. 



range of, in time, 494. 



arteinisiaefolia, 342. 



glandulosa, 342. 



Gravenhorstii, 340.* 



latifolia, 342. 



laxns, 290 * 



Newberryi, 342. 



obtusiloba, 342. 



polyphylla, 342. 



tridactylis, 340. 

 Spherozoum orientale, 748. 

 Spherulites, 88.§ 



Hceningshausi, 484.* 

 Spicula of Sponges, 165, 482,* 



748* 

 Spiders, 182,g 356. 



first of, 451* 



range of, in time, 402. 

 Spinax, 279.g 



Blainvillii, 277.* 

 Spirifer, 182,*g 258, 303. 



acuminatus, 274.* 



arenosus, 267. 



biplicatus, 313.* 



bisulcatus, 314* 



cameratus, 347,* 371. 



Clannyanus, 376. 



concinnus, 255. 



crispus, 243, 261. 



cristatus, 374. 



cultrijugatus, 274. 



disjunctus, 109.* 



giganteus, 109.* 



glaber, 316, 319* 



granuliferus, 284. 



gregarius, 274.* 



incrassatus, 314. 



increbescens, 314. 



Kentuckensis, 348. 



lineatus, 348, 357. 



macropleurus, 202, 254,* 

 255. 



Meusebachanus, 347.* 



mucronatns, 2S4.* 



Niagarensis, 240.* 



octoplicatus, 314.* 



pectiniferus, 371. 



perlamellosus, 255. 



planoconvexus, 371. 



radiatns, 237, 242, 261. 



rugosus, 255. 



speciosus, 319. 



spinosus, 314. 



striatus, 181,* 347. 



sulcatus, 240,* 261. 



umbonatns, 284.* 



uncinatus, 435. 



undulatus, 374. 



Urii. 357, 376. 



Walcotti, 453 * 



range of, in time, 495. 



last of, 450. 

 Spiriferiua (= Spirifer) Wal- 

 cotti, 464. 

 Spirigera lamellosa, 318.* 

 Spiritual element in the 

 eartb's arrangements, 

 740. 



Spirorbis, 367, 399. 

 Spirula, 156.g 

 Sponges, 165.g* 



spicula of, 165, 482,* 748* 



relations of, 748. 



in Chazy, 209. 



in Cretaceous, 482. 



in Potsdam, 186.* 



in Trenton, 211. 

 Spongiolithis appendiculata, 



512* 

 Spore, 165.g 

 Springs, thermal, 411. 



thermal, in metamorphic 

 regions, 710. 



thermal, in volcanic re- 

 gions, 699. 

 Squalodon, 529.§ 

 Squalodonts, 27 8. g* 



first of, 473. 



range of, in time, 572. 

 Squaloids, 278.§ 

 Squalus cornubicus, 67. 

 Squid, 156.g 

 Squirrel, 423.g 

 Stag family, range of, in time, 



572. 

 Stalactite, 85.g 

 Stalagmite, 85.§ 

 Star-hsh, 159.g* 

 Star-fishes, range of, in time, 



400. 

 Staurotide, 58.g* 

 Steam, agency of superheated, 

 in metamorphism, 708. 

 Steatite, 61,g 81.g 

 Steffensia, 355. 

 Steneofiber, 529.g 

 Steneosaurus, 346,g 462. 

 Stenopora, 190.g 

 Stephanocrinus angulatus, 



240* 

 Stereognathus, 462,g 571. 

 Sternbergia, 2S3.g 337 .g 

 Stigmaria, 336,g 356. 



Anabathra^ 342. 



ficoides, 337,* 342. 



minor, 342. 



undulata, 342. 

 Stilbite, 62.g 

 Stinkstein, 372. 

 Stockbridge marble, 391. 

 Stone period, 583. 

 Stonesfield slate, 448. 

 Stones River group, 384. 

 Strata, positions of, 101. 



dislocations of, 103.g 



order of arrangement of, 

 112. 

 Stratification, 90, 91.g 

 Stratified rocks, 70.§ 



modes of formation of,678. 



thickness of, 116. 

 Stratum, 91.g 

 Strepsirrhines, 422.g 

 Streptorhynchus Missourien- 

 sis, 371. 



Umbraculum, 314, 318.* 

 371. 

 Strickland, on the Dodo, 578. 

 Stricklandia, 181.g 



elongata, 274. 

 Strike, 105.? 



Stringocephalus, 181,g 303. 

 Stromatopora, 191.g 



concentrica, 240,* 242,261, 

 262. 

 Stromboli, 692. 

 Strombus, first of, 434. 

 Strophalosia, 184,g 376. 

 excavata, 375. 

 last of, 376. 

 Strophomena, 184.g* 



alternata, 213,* 216, 220, 



224. 

 punctulifera, 255. 

 radiata, 254,* 255. 

 rugosa, 213,* 240,* 242, 



255, 261. 

 range of, in time, 495. 

 Sturgeon, 278.g 

 Subapennine Tertiary, 523. 

 Subcarboniferous period, 306. 



coal in, 307. 

 Subsidence, causes of, 716. 

 necessary for the forma- 

 tion of a thick series of 

 strata, 625. 

 slow during rock-forma- 

 tion, 219. 

 through the Palseozoic, 



388. 

 of N. America during the 

 Drift epoch, evidence 

 against, 542, 553. 

 of the Champlain epoch, 



555. 

 of the British Channel, 



734. 

 of the Mediterranean in 



the Post-tertiary, 734. 

 of the Pacific indicated 



by coral islands, 587. 

 originating the depres- 

 sions of Lake Cham- 

 plain and the Great 

 Lakes, 199. 

 Subsidences in the Appala- 

 chians, 387. 

 Suctoria, 155.g 

 Suffolk crag, 523. 

 Sulphur, 54.g 



springs, 248. 

 Sumter Epoch, 506, 511, 522. 

 Superga Hill, 523. 

 Superposition, order of, 113. 

 Surgent series, 379. 

 Surirella craticula, 631.* 

 Sus, 529. 

 Swallow on rocks of Missouri, 



383. 

 Swallow & Hawn on Permian, 



370. 

 Swanton, rocks at, 174. 

 Sweden, recent change of level 

 in, 586. 

 Azoic in, 137. 

 Cretaceous in, 479. 

 iron-mines of, 141. 

 Primordial in, 178. 

 Trenton in, 207. 

 Switzerland, Cretaceous in, 

 481. 

 Tertiary in, 523. 

 glacier regions of, 668. 

 great glacier of, 545. 



