INDEX. 



881 



Cvpris, in Triassic, 416. 

 Cyrena, 450, SOS. 



arenaria, 468. 



Caritoni, 508. 

 Cyrena cunciformis, 518. 



intermedia, 501. 



pulchra, 519. 



semistriata, 518, 519. 



shale, 513. 



tellinella, 51S. 

 Cyrtia, 171, § 179. 

 Cyrtina, 171- 



rostrata, 256. 



umbonata, 274. 

 Cyrtoceras, 228,229,429. 

 'annulatum,20l : *203. 



inasquiseptum, 208. 



multicameratuin, 208. 



sacculum, 274. 



undulatum, 261. 

 Cvrtodonta, 203, 243 



"Hindi, 205. 

 Cyrtolites, 203. 



compressus, 201,* 203. 



imbricatns, 206. 



ornatus, 206. 



Trentonensis, 201 * 203. 

 Cvstideans, or Cystids, 129, § 

 382. § 



a comprehensive type, 382. 



last of, 288. 



number of, in Lower Silu- 

 rian, 203. 



range of, in time, 385, 386. 

 Cystiphyllum, 230. 



Siluriense, 245, 246* 247. 

 Cythere. 304. 



Americana, 120.* 

 Cytherea, 475, 495. 



Dachstein beds, 425, 429. 

 Dacyte, 78. § 

 Dadoxylon,349. 371. 



Brandlingi, 331. 



Ouangondianum, 271. 

 Dakota, Archaean in, 150. 



Cretaceous in, 456. 



Jurassic in, 431. 



Triassic in, 406. 

 Dakota group, 454, 456. 

 Dalmanites, 174, § 204, 228, 229, 

 249, 253, 285. 



Boothii, 274. 



calliteles,273,*274. 



Hausmanni, 174,* 240. 



limulurus 227*229. 



nasuta, 248. 



pleuroptyx, 238, 240, 243. 



selenurus, 261. 

 Daniour, A., on composition of 



Millepores, 60. 

 Damouri'e, 54. § 



Danian group, 470. 

 Dan River coal-field, 406. 

 Dapedius politus, 449. 

 Darien, Isthmus of, 669. 

 Dartmouth group, 282. 

 Darwin, C., on Atlantic dust- 

 shower, 634. 



on coral islands, 625, 783. 



South America, 831. 

 Darwin, G. H. 713, 815, 834. 

 Dasyceps Bucklandi, 372. 

 Dasypus group, 570. 

 Daubrtse, formation of silicates 

 by means of superheated 

 steam, 759. 



on fractures, etc., 801, 832. 



thermal waters, 756, 777, 780. 

 56 



Davidson, T., on Brachiopods, 



169. 

 Davidsonia, 173. § 

 Davis, effects of tidal action, 



681. 

 Dawsonella Meeki, 333*, 342. 

 Dawson, J. W., Annelids in Ar- 

 chaean, 159. 



carbon in Archaean, 157. 



Devonian life, 274. 



Eozoic time, 148. 



Eozoon, 158. 



fossil wood, 258, 270, 331. 



iron-ores in Nova Scotia, 74 



Joggins section, 319. 



land-snails, Carboniferous, 

 341, 358. 



metamorphic Devonian, 289. 



origin of coal, 362. 



Quaternary mollusks, 553. 



Rhizopods, 189. 



spores in coal, 318. 



Xylobius, 350. 

 Dead Sea, 14. 

 Deane, on tracks of Insects, 



416. 

 Death's Valley, 15. 

 Debituminization, 400, 756. 

 Decapods, 122,§ 335. 



range of, in 'time, 388.* 

 Decomposition of wood, 352. 



of rocks, 702. 

 Deep River coal-field, 406. 

 Deep-sea Coral zone, 611. 

 Deer, 507, 518, 520, 564, 568, 



577. 

 De la Beche, Cornwall veins, 



773, 781, 782. 

 Delaware, Cretaceous in, 455. 

 Delaware River, in the Creta- 

 ceous, 478. 

 Delesse, 722, 770. 



on moisture in rocks, 667. 

 Delphinus, 520. 



Conradi, 511. 

 Delta formations, 659, 681. 



of the Indus, recent changes 

 of level in, 585. 

 Delthyris shaly limestone, 164, 



237. 

 Delthyris. See Spirifer. 

 Deltidium, 170. § 

 Deltodus, 304. 

 Dendrerpeton Acadianum, 343. 



Oweni, 343. 

 Dendrocrinus, 204. 

 Dendrodus, 286. 

 Dendrograptus Hallianus, 177. 

 Dendrophyllia, 117,* 619. 

 Denmark, Cretaceous in, 470. 



human remains in, 576. 



Quaternary in, 532. 

 Dentalina pulchra, 466. 

 Dentalium, 385. 



M^ekianum, 342. 



Mississippiense, 499,* 509. 



obsoletum, 333,* 342. 

 Denudation complicating out- 

 crops, 96. § 

 Deoxydation, <11. 

 Depth of growing corals, 617. 



of species, zones in, 611. 



See Oceax. 

 Descent of rivers, 638. 

 Deserts, distribution of, 45. 



sands of, 631. 

 Desmids, 135. § 



in hornstone or flint, 257, 

 302, 471. 



Desor, E., on Niagara retroces- 

 sion, 590. 

 Destruction of life. See Ex- 

 terminations. 

 Detenu i nation of age of strata, 



102.§ 

 Detritus, 68. § 



along sea-shores, 679, 680. 



of rivers, 657. 

 Development, law of, in the 



earth's history, 756. 

 Deville, 728, 749. 

 Devonian Age, 139. 254. 



and Carboniferous plainly 

 separated, 281. 



and Carboniferous uncon- 

 formable, 289. 



and Silurian united by the 

 Ludlow beds, 244. 



foreign, 282. 



in New England, 237, 256. 



life of, 288. 



thickness of rocks of, 373, 

 381. 



wanting in Dakota, 232. 

 Diabase, 78. § 

 Diabasyte, 70,§ 78. 

 Diadema, 466, 474. 



Bennettite, 476. 



seriale, 437,* 448. 

 Diallage rock, 73.§ 

 Diatoms, 59, 69, 135,§ 496* 611, 

 617, 632,* 745. 



in flint, 257,* 471. 



of Virginia Tertiary, 496.* 

 Dibranchs, 124,§ 439, 483. 

 Dicellocephalus, 168, 174,§ 178 

 18S, 190, 192. 



Minnesotensis, 177,* 178. 

 Diceras arietinum, 438,* 449. 

 Dichobune, 519. 



cervinum, 519. 

 Dichocrinus, 303. 

 Dichodon, 5l9. 



cuspidatus, 519. 

 Dichotomizing ribs on Brachio- 

 pods, 243. 

 Dick, analysis of coal, 316. 

 Dicotyledons, 134,§ 609. 



range of, in time, 140.* 

 Dicotyles, 503, 511, 565. 



antiquus, 511. 



Hesperius, 511. 



pristinus, 511. 

 Dictyocha crux, 496.* 

 Dictvoneura anthracophilla, 

 350,* 341. 



Iluinboldtiana, 351. 



libelluloides, 351. 

 Dictyopteris, 348. 

 Didymograptus geminus, 192. 



hirundo, 192. 

 Difficulties in determining age 



of rocks, 101.§ 

 Dikes, formation of, 740, 770. 



structure of, 109,§ lll.§* 



of Connecticut valley, origin 

 of, 741. 

 Diluvian epoch, 543. 

 Dimorphodon macronyx, 449. 

 Dimyaries, 126. § 



range of, in time, 387.* 

 Dinicthys Hertzeri, 274, 275. 

 Dinictis, 511. 

 Dinoceras, 494, 504, § 508. 



mirabile, 504, 510. 

 Dinophis grandis, 501, 509. 



Halidanus, 509. 



littoralis, 509. 



