INDEX. 



781 



Cryptoceras undatum, 214.* 

 Cryptogams, 165.? 



existing, 333. 

 Crystalline rocks, formation 



of, 706. 

 Crystallization, 625.? 



a result of metamorphism, 

 706. 

 Crystallizations, alongside of 



dikes, 708. 

 Ctenacantkus major, 319.* 

 Ctenodonta nasuta, 213.* 

 Ctenoides gigantea, 453,* 464. 

 Ctenoids, 27 8. § 

 Culmination of types, 400, 571, 



594. 

 Cnneolina Payonia, 164,* 483* 

 Currents, atmospheric, 44. 



oceanic, 39,* 650, 652, 654, 

 657. 



oceanic, erosion by, 655. 



Atlantic, in the Potsdam 

 period, 200. 

 Cutch. recent changes of leyel 



in, 588. 

 Cuttle-fish, 155.? 

 Cyathaxonia prolifera, 347. 

 Cyathea compta, 338.* 

 Cyathocrinus, 162.? 



ornatissimus, 289. 

 Cyathophyllids, 163.? 

 Cyathophylloid corals, a com- 

 prehensiye type, 756. 



corals, last of, 374. 

 Cyathophyllum, 163. 



rugosum. 273.* 

 Cycads, 418,? 500. 



a comprehensiye type, 597. 



distribution of, 418. 



in Maryland beds, 472. 



range of. in time, 495. 

 Cycloids, 2T8.g 

 Cyclonema cancellata, 237.* 



sulcata, 249. 

 Cyclophthalmus Bucklandi, 



35S.* 

 Cyclopteris, 338,? 355. 



elegans, 339. 



Jacksoni, 283, 290. 



Linnaeifolia, 420* 



pachyrachis, 420. 



range of, in time, 494. 

 Cylindrites acutus, 464. 

 Cymbella maculata, 631* 

 Cynodon, 529.? 

 Cyperites, 336.? 

 Cyprsea, first of, 4S4. 



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.§ 



umbonata, 284. 

 Cyrtoceras annulatum, 214.* 



dorsatum, 371. 



undulatum, 275. 



Cyrtolites compressus, 213.* 

 ornatus, 221. 

 Trentonensis, 213.* 

 CystideaBS, or Cystids, 161,? 

 395; 398. 

 a comprehensiye 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, 2S3.? 



Brandlingi, 337. 



Ouangondianum, 290. 

 Dakota. See Missouri, Upper. 

 Dakota group, 469. 

 Dalmania calliteies, 286* 



Hausmanni, 18S,* 255. 



liniulurus, 241,* 242. 



nasuta, 262. 



pleuroptyx, 253, 254, 255. 



selenurus, 275. 

 Daman group, 480. 

 Daphnia, 154.? 

 Dartmouth group, 294. 

 Darwin, C, on Atlantic dust- 

 shower, 631. 



on coral islands, 622. 

 Dasypus group, 423.? 



group, Post-tertiary, 556. 

 Dasyurus, 424.? 

 Daubree, on formation of sili- 

 cates by means of super- 

 heated steam, 708. 

 Dayidsonia, 185.§ 

 Davis, effects of tidal action, 661. 

 Dawson, 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.? 



range of, in time, 402. 

 Decomposition of wood, 359. 

 Deer, Eocene, 572. 

 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, 588. 

 Delthyris shaly limestone, 252. 

 Delthyris. See Spirifer. 

 Dendrerpeton Acadianum, 350. 

 Dendrophyllia, 148* 

 Dentalina pulchra, 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.? 



along sea-sLores, 659, 660. 



of rivers, 643.? 

 Development, examples of law 

 of, in the earth's his- 

 tory, 739. 

 Devonian age, 265, 750. 



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 limestone, 294. 

 Diabase, 77,? 79.? 

 Diadema seriale, 453,* 464. 

 Diallage, 60,? 82.? 

 Diamonds, age of, 413. 

 Diatoms. 66, 166.? 629* 



in flint, 271,'* 481. 



of Virginia Tertiary, 512.=* 

 Dibranchiates, 156.? 

 Dicellocephalus Iowensis,189.* 



magnificus, 193. 



Minnesotensis, 189.* 

 Diceras, 459.? 



Diceras arietina, 459,* 465. 

 Dichobune, 527,? 529. 

 Dichodon, 528. 

 Dichotomizing ribs on Bra- 



chiopods, 267. 

 Dicotyledons, 167.? 

 Dictyoneura anthracophila, 



358* 

 Dictyocha Crux, 512* 

 Dictvopteris, 355. 

 Didelphys, 424,? 529. 

 Diestian group, 523. 

 Digitigrades, 422,? 

 Dikes, formation of, 703. 



structure of, 122.? 



of Connecticut valley, ori- 

 gin of, 703. 

 Dimyaries, 157.? 



range of, in time, 401. 

 Dinictis, U. Missouri, 519.? 

 Dinornis giganteus, 578. 

 Dinosaurs, 346,? 452. 



range of, in time, 572. 

 Dinothere (D. giganteum) 



528* 

 Diorite, 78,? 89 ? 

 Dioritic schist, 78.? 

 Dip, 105.§ 



of Triassic beds, 432. 

 Diphyphyllum stramineum. 



270. 

 Diplazites, 355. 

 Diplotegium, 356. 

 Diploxylon, 356. 

 Diprotodon, 424,? 566. 

 Dipters, 421 ? 



Dipterus macrolepidotus,298* 

 Dirt-beds of the Coal-mea- 

 sures, 326. 

 Discina, 184,? 186, 187, 399. 



lamellosa, 183* 

 Dislocations, 103.? 



See Disturbances. 

 Distortions of fossils, 109.? 

 Disturbances after L. Silurian, 

 226. 



