INDEX. 
673 
Diminution, gradual, of northern erratic blocks, as they recede 
from their original source, 523. 
Diminution of the volume of water in the Russian rivers, 
578, 579. 
Dimitrofka (north of Baelnnuth), coal seams at, 116. 
Dimvaria, number of species of this group, in the Permian 
system, 209. 
Diorna, calcareous rocks (Permian) on the banks of the, 151. 
Dinrite of the Ural mountains. See Greenstone. 
of the cape of Barmin-mis (Timm), 413. 
Dip, slight, of the lower Silurian rocks of St. Petersburgh, 26*. 
of the Devonian beds near Bielef, 58. 
— • of the Inoeeramus ( Avicula ) sandstone, 245. 
Diphyphyllum, a proposed new genus of corals, described, 622. 
concinnum, described, 624. 
Diploplerus and Gtyptosteus, scales of these genera of Devo- 
nian fishes found north of Tchudova, 43. 
Direction of the northern drift, constant over wide tracts, 522. 
opposite to that of the existing 
river courses, 525. See arrows on Map, Plate VI. 
of the Scandinavian drift exccntric, 527, 528. 
, undeviating, of each trainee of the northern drift, 565. 
of the principal lines of elevation in the Ural and 
other northern mountains of Europe, 587. 
Dislocations, transverse, along the north palseozoic frontier, 23*. 
of carboniferous strata in the gorges and valleys of 
the Valdai Hills, 73. 
near the Douetz, 102 ; in the Ural mountains, 357 
to 470. 
affecting the Permian rocks on the Kidash, 155. 
of the Permian series near Salaouch, east of Kazan, 
161. 
— ~, absence of, in great part of Russia, 584. 
Dislocated condition of the coal strata of the Douetz and Pe- 
trofskava, 116, 119. 
Dislocation, line of, throwing up Permian limestone, 183. 
, marked by a bend of the Bielaya, 431. 
Disseminated copper in the Permian strata, explanation of, 170. 
gold through various rocks, recency of, 483. 
Disturbances, transverse, lines of, near Lake Onega, 24. 
of the lower Silurian strata of the Pulkovka 
brook, 31. 
, absence of any violent ones affecting the Russian 
carboniferous series, 1 33. 
of the carboniferous strata near the eruptive rocks 
of Tehaitzin-mis, 416. 
, general direction of the lines of, in Russia and 
the Ural mountains, 587. 
Divitinskaya (Vitegra), superposition of the carboniferous beds 
on the old red strata at, 49. 
Djabyk Karagai, and Kara-Edir-tau, a low granitic chain parallel 
to the Ural, 444. 
Djelebeck (Norway), granite covered by metamorphosed Si- 
lurian limestone, at, 14. 
Dnieper andDon, carboniferous region of the Douetz between, 89. 
Dnieper, absence of coal in the drainage of, 1 1 7. 
, extension of eocene tertiary beds to, 283. 
, changes of land at the mouth of that river, 573. 
Dobson, Mr., the first person who suggested the idea of striae 
having been effected by stones in icebergs, 534. 
Dolgelly in North Wales, copper ore found in peat bog, 169. 
Dolomite in lower carboniferous rocks of Valdai Hills, 72, 73. 
overlying the white limestone of Moscow, 81. 
(tufaceous) of the Permian system near Perm, 143. 
(black) in the Ural mountains, 376, 385, 399. 
(saccharoid) near Ust-Serebriansk, 385. 
and greenstones in contact at Sat kfti.sk, 429. 
Dolomitic limestones on the banks of the Tchussovaya, 126. 
conglomerates of Worcestershire, rocks resembling 
them in Russia, 1 76. 
D’Omalius d’llalloy, his name of Peneen, 140. 
Domanik (black) schists, first classed as upper Silurian, 413, and 
afterwards as Devonian, 645. 
Dombrova and Bendzin, Poland, coal sixty feet thick at, 651. 
Dome, great central, of Devonian rocks, 53. 
, imperfect, of the coal strata at Lissitchia-Balka, 109. 
Don, river, near A’oroncjc, the most southerly point at which 
Devonian rocks appear, 60. 
, upper sections of the, afford thirty species of true Devo- 
nian shells with iehtliyolitcs, 62. 
and Dnieper, carboniferous region between, 89. S eeDonelz. 
, cretaceous rocks of the, 270. 
, new land near the mouth of, 573. 
Cossacks, chalk of the country of the, 265. 
Cossacks, capital of the, built of steppe limestone, 299. 
Donetz, coal-field, and region watered by the, 88, 89. 
, carboniferous sections on the, 102. 
, comparison of the coal-field of, with that of other parts 
of Europe, 122. 
, Jurassic rocks near Izium on the, 249, 250. 
, lowest Jurassic beds on this river the equivalents of 
highest beds at Moscow, 25 1 . 
, J urassic rocks of the, compared with the white lime- 
stone of Cracow and the coral rag, &c. of England, 253. 
, chalk of the, 265. 
Donctzkava, on the Don, natural sections of the carboniferous 
rocks near, 102. 
Donkof, or Dankof ou the Don, sandy magnesian limestones of 
the Devonian period at, 61. 
D’Orbigny, M. Ale., his work on South America, 6. 
, his view of the analogy existing between 
the termination of the palaeozoic and the cretaceous pe- 
riods, 210. 
, his examination of the Jurassic fossils of 
Moscow, Koroshovo, &c., 238. (See Description of vol ii 
419.) 
Dorpat, Silurian detritus transported to, 510. 
, fossil fishes from the Devonian beds of, 40, 52. 
Drammen (Norway), eruptive and inetamorphic rocks near, 14. 
Drechitiloflta, near Simbirsk, tertiary fossils at, 278. 
Drift. See also Blocks , Erratics , Detritus , &c. 
Drift sands, thickness of, between Ust-Vaga and Ustiug, 176. 
, local use of the term for the Ural alluvia, 476. 
, forming the mammoth clay, at Taganrog, 502. 
, Scandinavian, and erratic blocks in Russia, 507. 
, northern, and erratic blocks near St. Petersburgh, 512. 
, partial absence of, ou the banks of the Audoma, 516. 
, mixture of, in Russia, 522. 
, northern, deposited at the bottom of a sea, 524. 
excentric.'illy thrown off from Scandinavia, 527. 
•, great masses of, have acted like glaciers, 536. 
and erratic blocks, difference between them in Sweden, 546. 
in the vicinity of polished rocks in KiUarney, 549. 
, mounds of, act like glaciers, 553, 554. 
in Russia by rivers, 565. 
Dubois de Moutpereux, M., his collection of tertiary fossils from 
Butschak on the Dnieper, 286. 
• , bis discovery of true eocene beds in 
Armenia, 289; his Caucasian maps, 576, 656. 
, his determination of the age of the 
Yolhyninn and Podolian deposits, 293. 
, his division of tertiary deposits, 294. 
■ , his account of the tract between 
Circassia and the Caucasus, 575. 
Duderhof, St. Petersburg, lower Silurian hills of, 28*. 
Dufrenoy, M., his geological map of France, 4. 
— , bis view of the nnmmulitic beds of the Pyrenees 
284. 
Dima river, Devonian rocks along the banks of, from Riga to 
Kircbholm and Kokenhitsen, 50. 
, comparative absence of erratic blocks iu the estuary 
of the,, 510. 
Diinhof (Livonia), gypsum quarried at, 51. 
Duration of species, relation between this and their wide exten- 
sion, 216. 
Durocher, M. See M. Elie de Beaumont on his memoir, 526. 
