624 
INDEX. 
DANA. 
Dana, on volcanic minerals, 500. 
Danish kitchen-middens, 146. 
Dapedius mo7iilifer, Lias, 358. 
Darbishire on shells of Moel Tryfaen, 180. 
Dartmoor, post-carboniferous granite of, 
5T2. 
-, intrusive granite at, 5T2. 
Darwin, Mr., on foliation and lamination, 
595. 
-, on mammalia of South America, 160. 
-, on marine saurian, 362. 
-, on rise of part of South America, T2. 
-, on sinking of coral reefs, T2. 
-, on plutonic rocks of the Andes, 569. 
-, on relationship of extinct to living 
types, 160. 
Dates of discovery of fossil vertebrata, 
464. 
Daubeny, Dr., on decomposition of tra- 
chytic rocks, 586. 
Daubree, on formation of zeolites, 521. 
-, on alkaline waters of Plombieres, 
584. 
Davidson, Mr., on Spiriferina, 355. 
Davis, Mr. E., on fossils of Lingula Flags, 
484. 
Dawkins, Mr. Boyd, on Hyaena spelaea, 
158. 
-, on mammalia of Cromer Forest-bed, 
191. 
-, on Triassic mammifer, 369. 
Dawson, Dr., on Devonian flora and in¬ 
sects, 456, 457. 
-, on Eozoon Canadense, 491. 
-, on Nova 8cotia coal-measures, 409. 
-, on Nova Scotia coal-plants, 410, 412. 
-, on Pupa vetusta, 415. 
-, on reptiles and shells in Nova Scotia 
coal, 413. 
■ -, on structure of calamite, 425. 
-, on structure of sigillaria, 426. 
Deane, Dr., on foot-prints in Trias, 382. 
Debey, Dr., on flora and fauna of Aix, 302- 
304. 
Dechen, M. von, on organic remains of the 
brown coal, 540. 
-, on Cornish granite veins, 560. 
De la Beche, Sir H., on granite of Dart¬ 
moor, 582. 
■ -, on Carrara marble, 599. 
-, on mineral veins, 616. 
-, on Eedruth copper-mine, 610. 
-, on saurians of the Lias, 362. 
-, on trap-rocks of New Red, 545. 
-, on Welsh coal-measures, 397. 
Delesse, on action of water in metamor¬ 
phism, 585. 
Deltas, strata accumulated in, 28. 
Dendrerpeton in Coal, 413. 
Denudation defined, 96. 
-, subaerial, 97. 
-, littoral, 102. 
-, submarine, 105. 
■ -, average annual amount of subaerial, 
113. 
-of carboniferous strata, 396. 
-counteracting upheaval, 106-115. 
-a means of exposing crystalline rocks, 
563. 
-, trap-dikes cut off by, 518. 
■ -and volcanic force antagonistic pow¬ 
ers, 115. 
DUNCAN. 
Deposition, rate of, shown by fossils, 47. 
Derbyshire, veins in Mountain Limestone, 
608. 
Derivative shells of the Red Crag, 195- 
203. 
Desnoyers, M., on age of Faluns, 142. 
-, on Eocene fossil foot-prints, 272. 
Desor, M., on Celtic coins in lake-dwell¬ 
ings, 149. 
Devonian Period, Upper, 450, Middle, 450, 
Lower, 453. 
-fossils of the Eifel, 534. 
-of Russia, 454. 
-of United States and Canada, 455 
-insects of Canada, 457. 
-strata, classification of, 439-450. 
Devonshire, cleavage of slate rocks in, 
593. 
Diabase, 505. 
Diagonal, or cross-stratification, 42. 
Diagram of fossiliferous rocks, 137. 
-of plutonic and sedimentary forma¬ 
tions, 567. 
Diallage, 500, 502. 
Diastopora diluviana,'Bat]i Oolite, 343. 
Diatomacese forming tripoli, 51. 
Diceras Lonsdalii, Neocomian, 310. 
Didelphys Azai'ce, Recent, 347. 
Didymograpsus gemmus, 476. 
- Murchisonii, 473. 
Dike cutting through shale, Anglesea, 
515. 
-cutting through chalk, Antrim, 515, 
516. 
Dikelocephalus Minmsotensis, 490. 
Dikes defined, 30. 
-of Monte Somma, 526. 
-in Palagonia, ground-plan of, 532. 
-, volcanic or trap, 513-517. 
Diluvium, origin of term, 167. 
Dinornis Palapteryx, ofNew Zealand, 160. 
Dinotherium giganteum, 212. 
Diorite, 505. 
Dip and strike, terms explained, 80. 
Diplograpsus folium, Llandeilo Flags, 474. 
- pristis, Llandeilo beds, 473. 
Dirt-bed of the Purbeck, 331. 
Dogger-bank described, 105. 
Dolerite, a variety of basalt, 504. 
Dolomite defined, 38. 
Dolomitic conglomerate of Bristol, 373. 
Downs, escarpments of North and South, 
104. 
Downton Sandstone, 459. 
Dowson, Mr., on shells of Aldeby beds, 
192. 
Drew, Mr., on Hastings Sands, 316. 
Drift of Ireland, 190. 
-of Norfolk clitfs, 190. 
-of Scandinavia, 174. 
-of Bridlington, 189. 
-carried by icebergs, 172. 
-shells in Canada, 183. 
-, contorted strata in, 178. 
-, marine shells in Scotch, 175. 
Dudley Limestone, 465. 
Dufrenoy, M., on granite of Pyrenees, 
582. 
Dumont, Prof., on Belgian Lower Eocene, 
282. 
Duncan, Dr., on Neozoic corals passing 
down to Devonian, 432. 
