INDEX. 
687 
Nazimskaya-gora (Zlataust), minerals from, 428. 
Neiva (North Ural), remarkable deposit of auriferous detritus 
on the left bank of the, 486. 
Ncocomiim, or lower greensand strata, beds of, in the Crimea 
and Caucasus, 260. 
Nepaul, fossils collected there by General Hardwick, 257. 
Nerecta river (Vladimir), low ridge of white carboniferous lime- 
stone on the, 85. 
Nerinski, on the Oka, gypsum of the Permian epoch in the 
cliffs at, 181. 
Kerithut Danubialis found in the white steppe limestone of 
Odessa, 301 . 
Neeropteris, a Permian species of this fern found also in the 
rothe-todte-liegende, 109. 
Ncviausk (North Ural), zavod of, good reception at, 368. 
Newfoundland, Silurian rocks of, 6. 
Niemen river, absence of erratic blocks in the valley of, 510. 
Nijny Novgorod, red marls and sands (Permian) seen in de- 
scending the V olga from Kostroma to this city, 1 78 to 1 80. 
1 magnificent sections of coloured sands and 
marls (Permian) at, 180. 
Serginsk, sectiou on the flanks of the Ural from Sarana 
to this town, 128. 
, mineral springs and altered and eruptive rocks 
of, 356, 357. 
Tagilsk (see Demidoff), munificent reception at, 369. 
(North Ural), rocks near, 369. 
, zavod of, 369. 
, malachite copper and magnetic iron ores of, 370, 
372. 
, gold alluvia of, 486. 
Troitsk (and Verkni) near llielebei, white marlstone (Per- 
mian), 153. 
Turinsk (North Ural), zavod of, 394. 
Nikefur on the Zavakaya, a tributary of the Dioma, section of 
Permian rocks at this place, 151. 
Nikitol'ka, or Jelcznoe, in the Donetz region, coal mines of, 
105. 
Nikolskaya, on the Tosna, section at, 29*. 
Ninokotskoi, near Archangel, origin of the salt pits at, 518. 
Nitrogen, singular abundance of, in the tchoruozem of Russia, 
560. 
North Ural, structure of, 337 to 412. 
— , Oxfordian beds on the flanks of, 230, 417. 
Northern Russia, agreement of the succession with that of other 
parts of the country, 230. 
Northumberland, coal-field of, represented in the Jurassic car- 
boniferous system of Southern Russia (Douetz), 70. 
Norway, Azoic rocks of, 1 1 . 
, lower Silurian rocks of, 11*. 
, Mr. Murchison’s sketch of the palseozoic succession 
in, 11*. 
, upper Silurian fossils of, 12*. 
, mineral changes produced by eruptive rocks on the 
Silurian beds of, 14. 
, drift and erratics of, 542 et seg. 
, erosion of the surface of rocks near the fiords of, 542. 
Nosdri, cast of Kazan (Permian), white limestone at, 160. 
Nosrcka river, near Lake Onega, Devonian and carboniferous 
strata of, 48. 
Nova Zemlia, these islands a prolongation of the Ural chain, 340. 
, coal found in, 582. 
Novazilskaya, near Orel, fossiliferous Devonian strata of, 56. 
Novo Pavlufka, on the Minss, flagstones and shale of, 99. 
Salki, near Arzamas, interesting sectiou of Permian strata 
at, 165. 
— Tcherkask, near the Don, capital of the Don Cossacks, 100. 
, the town of, built upon and out of the steppe 
limestone, 299. 
Xitcu/tt cingulata, its importance in identifying British and 
Scandinavian Silurian strata, 12*. 
Nugush (South Ural), limestone of the valley of this river pro- 
bably Devonian, 459. 
Nummulite beds in the Crimsea overlying the chalk, probable 
date of, 284, 289. 
Nuts, fossil, in the calcareous goniatite grits (carboniferous) of 
Artinsk, 129. 
Obdorsk mountains, north-eastern limb of the Ural mountains, 
340. 
, plutonic rocks of (see Erman), 411. 
Obe, fossil mammalian remains on the banks of the, 495. 
Obolus or Ungulite, resemblance of its shining fragments to 
mica, 27*. 
Oboyau on the Psol, chalk replaced by a white variety of marly 
claystone or “Kicscl-thon” at, 268. 
Obsehey sirt, ridge of, composed of red sandstone and conglo- 
merate (Permian), 149. 
, fossiliferous siliceous grits of the Jurassic period 
on the slopes of, 247. 
Ocetr river, a tributary of the Oka, white (carboniferous) lime- 
stone with fossils observed on the banks of, 79, 83. 
, Jurassic fossils also found at, 234. 
Ochansk, between Perm and Kazan (Permian), 160. 
Ochrinka, on the Oka, Jurassic fossils found at, 234. 
Octilim, points of difference between this genus of coral and 
Lithodendron, 598. 
Oder, northern drift in the upper valley of, 525. 
Odessa limestone referred to the. Aralo-Caspian series, 301. 
Oesel, isle of, true upper Silurian strata there, 35. 
, fossils found there enumerated by M. Pander, 35. 
Oka river, central region of Devonian rocks exposed in the 
gorges of, 53. 
, Devonian succession shown on its banks, 55. 
, section of, from Orel to Lichvin and Peremishl, 55 
et seg. 
- , coal seam represented by a band of bituminous clay 
in the elitfs of, at Vornova (Peremishl), 78. 
, the white limestone of Moscow ranges along the 
course of, 80. 
, Moscow (carboniferous) limestone best exposed in 
sections on the, 81. 
, white limestone with red sands on the, 82. 
near Jelatma on the, 84. 
— -, Permian red marls and sauds on the hanks of, 180. 
, gypsum (Permian) ai Nerinski on the, 181. 
, Jurassic basin on the, 233. 
Oksevo (ou the Oka), Jurassic rocks of, 233. 
Oland, lower Silurian rocks of, 18*. 
Old red sandstone. Sec also Devonian. 
• • of the British Isles, nature of the deposit, 1 . 
, the name of Devonian system proposed as 
a synonym, 1*. 
■ , fossil remains of fishes found in America 
identical with those obtained from this deposit, 5*. 
overlying upper Silurian strata in Norway, 
13. 
, the identity of this series of beds with the 
Devonian series distinctly proved in Russia, 580, 581. 
, identity of the fossil remains of fishes found 
in these beds in Russia with those from the British Islands’ 
strata, 7*, 46, 52, 66. 
of Russia, its resemblance to the new and 
old red sandstones of England, 47. 
, extension of as far as the White 
Sea, 49. 
, doubtful age of a conglomerate, 94. 
•, beds of this system on the flanks of the 
Ural, 130, 364 et passim. 
, some, lithological analogies of the Russian 
beds of this age with the Permian rocks, 142. 
, rocks resembling these beds on the Sinera 
(east flank of Ural), 423. 
occurs at Akri-tau (South Ural), 460. 
Older rocks, their investigation one of the great objects of geo- 
logists of late years, 1. 
