IXDEX. 



w 



Coal, air-breathers in, 510. 



causes of purity of, 490. 



conversion into anthracite, 743. 



conversion of lignite into. 503. 



■ continuity of seams of, 503. 



zigzag flexures of. near lions, 53. 



formation at Brora, 411. 



at Brownsville. Pennsylvania, view of, 502. 



how formed, 479. 



period, climate of, 504. 



rain-prints in, 489. 



seams, union of. 500. 



slow accumulation of, 492. 



Coal-bearins: strata, thickness of. 465. 

 Coal-field of Ashby-de-la-Zouch, 69. 



of Virginia. 451. 



Coal-fields of United States, 493. 

 Coal-measures, 466. 



■ thickness of. in "Wales, 466. 



Coal-mine near Lyons, 4S2. 



Coal-pipes, danger of, 431. 



Coalbrook DaleT coal-measures of, 493. 



fossil beetles in, 494. 



faults in, 62, 



Coan. Mr., ou crater of Kilauea, 624. 

 CocMioclus contortus, 521. 

 Cockfield rocks altered by dikes, 614. 

 Cj>\ laeanthus granulatus, marl slate, 462. 

 Coleoptera of (Eningen beds. 257. 

 Colly rites ringens, Inferior Oolite, 412. 

 Columbia, vinegar river of, 299. 

 Columnar basalt in the Yicentin, 618. 



structure of volcanic rocks, 616. 



Come, ravine in lava of, 6S9. 

 Composition of volcanic rocks, 594. 

 Compact felspar, 605. 

 Concretionary structure, 37. 

 Condensation of rock -material, 38. 



of slate-rock, 751. 



Cone of a pine, Purbeck, 394. 



of Tartaret, 63S. • 



of Catalonia, 66S. 



Cones and craters, 593. 



absence of, in England, 6. 



Conformable stratification, 13. 

 Conglomerate, or pudding-stone, 11, 47. 



"dolomitic of Bristol, 446. 



Ooniferae of Coal period, 476. 

 Connecticut, New Bed Sandstone of, 453. 



beds, antiquity of, 456. 



Conoceplialus striatus, 5S0. 



Conocoryphe striata, 580. 



Consolidation of strata. 33. 



Contorted strata in drift, Forfarshire, 156. 



Conularia ornata, 540. 



Conus deperditus, 290. 



Conybeare. Mr., on term Poikilitic, 432. 



on Plesiosaurus, 424. 



on Bristol conglomerate, 447. 



on Oolite and Lias, 429. 



Coomb, the, near Lewes, 363. 



CoproUtes offish, 319. 



C iral islands and reefs. 34, 46. 



Coral-rag, fossils of, 398. 



Coralline crag, white or, 202. 



Corals of Devonian strata in United States, 545. 



of mountain limestone, 514. 



of Sicily, 194. 



neozoic type of, 515. 



pal&ozoic type of, 515. 



Corbula pisum, Hempstead beds, 239. 



alata, 350. 



Corinth, corrosion of rocks by gases near, 741. 



Cornbrash, composition of, 401. 



C >rnean, 605. 



Cornwall, granite veins of. 73^. 



granite veins in hornblende slate in, 713. 



Devonian series of, 535. 



lodes of, 772. 77'!. 



tin obtained by ancients from, 112. 



clay in, 12. 



■ vertical section of veins in mines, 769. 



Coryphodon eoca^nus. of Sheppey, 292. 

 Coseguina, volcano of'. 656. 

 Costa, Prof., cited. 18a 



Crag, Norwich, 197. 



- of Antwerp, 207. 



coralline, fossils in, 203. 



of Suffolk, red and coralline, 200-202. 



tables of marine testacea in, 205. 



Crag and tail, term described, 152. 



Cralg-Dhu, granite, 728. 



Craigleith quarry, slanting tree in, 483. ' 



"fossil trees, 40. 



Crania Parisiensis, "White Chalk, 327. 



attached to Echinus, 23. 



Crassatella sulcata, 287. 



Crater of the Island of St. Paul, 642. 



Craters and cones, 593. 



of Lagoa, Madeira, 650. 



of the" Sandwich Islands, 623. 



Credneria in quader-sandstein, 335. 

 Creeps in .coal-mines described, 52. 

 Cretaceous fossils, 325. 



rocks, classification of, 314. 



— — volcanic rocks, £96. 



: plutonic rocks, 723. 



formation of U. S., 338. 



flora, 332. 



derivation of term, 312. 



Crinoids, Silurian, 558. 



Cristellaria rotulata. Chalk, 26. 



Croatia, Lower Miocene of, 245. 



Croizet, M., on Auvergue fossil mammalia, 229 



Cromer, Norfolk drift at, 160. 



Crop out, term explained, 55. 



Crossopterigida?, or fringe-finned fish, 532. 



Crust of earth defined, 2. 



Crustaceans of Old Bed Sandstone. 526. 



Cryptodon angulatum, Hornsea, 294. 



Crystalline rocks, cleavage of, 754. 



limestone, 459. 



rocks, foliation of, 753. 



or metamorphic limestone, 735. 



erroneously termed primitive, 9. 



schists defined, 7. 



Cumbrecito, Pass of, 640. 



Cuming, Mr., collection of, 190. 



Cunningham, Mr. J., on rain-marks, 444. 



Cup-and-star corals, 515. 



Curral, the, in Madeira, 651. 



Curved strata, 48, 49. 



Cutch, Eunn of, 449. 



Cuvier, M., on tertiary series, 182. 



on Amphitherium, 408. 



on Eocene formation, 29S. 



on fossils of Montmartre, 298. 



Cyathea glauca, Carboniferous, 469. 

 Cyathina BowerbanTcii, Gault, 515. 

 Cyathocrinites planus, 517. 

 Cyathocrinus caryocrinoides, 517. 

 Cyathophyllum caispitosum, 533. 

 Cycadeoidea (3I~a?itellia) megalophylla, 390. 

 Cycadites comptus, Gristhorpe, 411. 

 Cyclas obovata, 28. 

 Cycloidal scaled fish, 533. 

 Cyclopian Islands, beds of clay and tuff at, 659. 

 Cyclostoma elegans, Pleistocene, 30. 

 Cyclopteris Rioernica, 524. 

 Cylindrites acutus, Great Oolite, 405. 

 Cyprma europaia, Bed Crag, 202. 

 Cypress swamps of Mississippi, 491. 

 Cypris fasciculata, 380. 



■ granulata, 380. 



gibbosa, Purbeck, 379. 



spinigera, Weald, 348. 



punctata, Lower Purbeck, 389. 



tuberculata, Purbeck, 379. 



leguminella, Purbeck, 379. 



■ Valdensis(C. faba),MS. 



(?) inflata, Coal, 493. 



striato-punctata, 380. 



Purbeckensis, Lower Purbeck, 389. 



Cy prides in "Weald, 348. 

 Cypridina serrato-striata, 537. 

 Cypridinien-schiefer, term explained, 537. 

 Cyrena fluminalis, 23. 



consobrina, 28. 



cuneiformis, 296. 



semistriata, Hempstead beds, 239. 



