INDEX. 



779 



Crystallization, 625.g 



a result of metaniorphisrn, 

 706. 

 Crystallizations, alongside of 



dikes, 708. 

 Ctenacanthus major, 319.* 

 Ctenodonta nasuta, 213 * 

 Ctenoides gigantea, 453,* 464. 

 Ctenoids, 278.§ 

 Culmination of types, 400, 571, 



594. 

 Cuneolina Pavonia, 161,* 483* 

 Currents, atmospheric, 44. 



oceanic, 39,* 650, 652, 654, 

 657. 



oceanic, erosion by, 655. 



Atlantic, in the Potsdam 

 period', 200. 

 Current, Gulf Stream, 41. 



Polar or Labrador, 41. 

 Cutch, recent changes of level 



in, 588. 

 Cuttle-fish, 155.§ 

 Cyathaxonia prolifera, 347. 

 Cyathea compta, 338.* 

 Cyathocrinus, 162,§ 



ornatissimus, 286. 

 Cyachophyllids, 163-2 

 Cyathophylloid corals, a com- 

 prehensive type, 754. 



corals, last of, 374. 

 Cyathophyllum, 163. 

 Cycads, 418,? 500. 



a comprehensive type, 597. 



distribution of, 418. 



in Maryland beds, 472. 



range of, in time, 495. 

 Cycloids, 278.§ 

 Cyclonema cancellata, 237.* 



sulcata, 249. 

 Cyclophthalmus • Bucklandi, 



358* 

 Cyclopteris, 338,£ 355. 



elegans, 339. 



Jacksoni. 2S3, 290. 



Linnteifolia, 420.* 



pachyrachis, 420. 



range of, in time, 494. 

 Cylindrites acutus, 464. 

 Cyuodon, 529. § 

 Cyperites, 336.§ 

 Cyprsea, first of, 484. 



Carolinensis, 522.* 



fenestralis, 517. 



lintea, 517. 



Pediculus, 522. 



spheroides, 517. 

 Cypricardia angusta, 293. 

 Cypridina serrato-striata, 297.* 

 Cypridina slates, 295. 

 Cyprina arenaria, 478. 

 Cypris, 154.? 



in Triassic, 426. 

 Cyrtia, 182.^ 



unibonata, 284. 

 Cyrtoceras annulatum, 214.* 



dorsatum, 371. 



uudulatum, 275. 

 Cyrtolites compressus, 213.* 



ornatus, 221. 



Trentonensis, 213.* 

 Cystideans, or Cystids, 161,2 

 395, 398. 



Cystideans, a comprehensive 

 type, 597 

 last of, 303. 

 number of, in L. Silurian, 



212. 

 range of, in time, 400. 

 relation of, to Mollusks, 

 597. 

 Cystiphyllum Siluriense, 263.* 

 Cythere Americana, 151.* 



Dadoxylon, 283. § 



Brandlingi, 337. 



Ouangondianum, 290. 

 Dakota. See Missouri, Upper. 

 Dakota group, 469. 

 Dalmania calliteles, 286.* 



Hausmanni, 188,* 255. 



limulurus, 241,* 242. 



nasuta, 262. 



pleuroptyx, 253, 254, 255. 



selenurus, 275. 

 Danian group, 480. 

 Daphnia, 154.| 

 Dartmouth group, 294. 

 Darwin, C, on Atlantic dust- 

 shower, 631. 



on coral islands, 622. 

 Dasypus group, 423.$ 



group, Post-tertiary, 566. 

 Dasyurus, 424.$ . 

 Daubree, on formation of sili- 

 cates by means of super- 

 heated steam, 708. 

 Davidsonia, 185.2 

 Davis, effects of tidal action, 



661. 

 Daw r son, J. W., on fossil wood, 

 266, 283. 



on land-snails, 347. 



on Xylobius, 350. 

 Deane, on tracks of Insects,427. 

 Debituminization, 410, 705. 

 Decapods, 153.2 



range of, in time, 402. 

 Decomposition of wood, 359. 

 Deer, Eocene, 527. 

 De Laski, on the Penobscot 



glacier, 545. 

 Delaware, Cretaceous in, 469. 

 Delphinus, 529. 



Conradi, 521. 

 Delta formations, 644, 663. 



of the Indus, recent 



changes of level in, 5S8. 



Delthyris shaly limestone, 252. 



Delthyris. See Spirifer. 



Dendrerpeton Acadianum, 



350. 

 Dendrophyllia, 148.* 

 Dentalina puichra, 474. 

 Dentalium, 399. 



Mississippiense, 517, 518.* 



obsoletum, 349* 

 Depth of growing corals, 619. 



of species, zones in, 608. 



See Ocean. 

 Dertonian group, 523. 

 Deserts, distribution of, 45. 

 Desmidieae, in hornstone or 



flint, 271,* 311, 481. 

 Detritus, 74.g 



along sea-shores, 659, 660. 



Detritus of rivers, 643.2 

 Development;, examples of law 

 of, in the earth's his- 

 tory, 739. 

 Devonian age, 265, 7a0. 



and Carboniferous uncon- 

 formable, 304. 



and Silurian united by 

 the Ludlow beds, 264. 



in New England, 409. 



thickness of rocks of, 386. 



wanting in Dakota, 245. 

 Devon limestones, 294. 

 Diabase, 77,g 79.g 

 Diadema seriale, 453,* 464. 

 Diallage, 60,2 82.§ 

 Diamonds, age of, 413. 

 Diatoms, 66, 167.§ 



in flint, 271,* 481. 



of Virginia Tertiary, 512.* 

 Dibranchiates, 156.2 

 Dicellocephalus Iowensis, 

 1S9* 



magnificus, 193. 



Minnesotensis, 189* 

 Diceras, 459.2 

 Diceras arietina, 459,* 465. 

 Dichobune, 527,| 529. 

 Dichodon, 528. 

 Dichotomizing ribs on Bra- 



chiopods, 267. 

 Dicotyledons, 167-2 

 Dictyoneura anthracophila, 



358* 

 Dictyocha Crux, 512* 

 Dictyopteris, 355. 

 Didelphys, 424,2 529. 

 Diestian group, 523. 

 Digitigrades, 422.2 

 Dikes, formation of, 703. 



structure of, 122-2 



of Connecticut valley, ori- 

 gin of, 703. 

 Dimyaries, 157-§ 



range of, in time, 401. 

 Dinictis, U. Missouri, 519.§ 

 Dinornis giganteus, 578. 

 Dinosaurs, 346,2 452. 



range of, in time, 572. 

 Dinothere (D. giganteum) 



528* 

 Diorite, 78,§ 89.g 

 Dioritic schist, 78.§ 

 Dip, 105-2 



of Triassic beds, 432. 

 Diphyphyllum stramineum, 



270. 

 Diplazites, 355. 

 Diplotegium, 356. 

 Diploxylon, 356. 

 Diprotodon, 424,2 566. 

 Dipters, 421-2 

 Dipterus macrolepidotus, 



298* 

 Dirt-beds of the Coal mea- 

 sures, 326. 

 Discina, 184,2186, 187, 399. 

 Discoplea atmospherica, 630.* 

 Dislocations, 103-2 



See Disturbances. 

 Distortions of fossils, 109-2 

 Disturbances after L. Silurian, 

 226. 



