590 INDEX. 



Nassau,descriptionof the Silurian Wissenbach schists, Ocker Thai, series of formations north-east of the, 



253. 291. 



grauwacke, 256. Ogwell, notice of the limestone of, 463. 



list of arenaceous strata of, 463. 



localities at which fossils are found, 257 and note. trap rocks of, 471. 



Natica, description of new species from PafFrath, 366. Older red conglomerate, account of a formation of. 



Nautilus, notice of, in Paleozoic strata, 326. near St. Ubes, 123. 



Navarin Island, description of the cliffs bordering, Olympus, notice of the physical features of the 



420. chain, 3. 

 observations on the origin of the de- ■ structure of, 10. 



posits, 420. Oolites, on the siliceous bodies of the, 193. 



New red conglomerate, description of, in the cuttings proofs of their organic origin, 



for the Birmingham and Gloucester railway, 547. 193. 



New red sandstone, description of, in the south-east Ophidiolites, Mr. Owen, description of some, from 



of Devon, 453. the London clay at Sheppey, 209. 

 subdivision of, into marls, sand- Orchardwell valley, notices of plants in the culm 



stones and conglomerates, 453. strata of, 458. 

 remarks respecting the origin of Organic remains, see Fossils. 



the conglomerates, 453. remarks on the absence of, in the 



the subdivision not considered new red sandstone, 457. 



members of an ascending series, 454. Orthis, remarks on the distribution of species in Pa- 

 remarks on the ferruginous co- laeozoic rocks, 318. 



lour of the, 454. remarks on species of, and description of 



jointed structure n&w species from the Devonian rocks of the Rhe- 



of the, 455. nish provinces, 371. 

 absence of or- from the Silurian 



ganic remains in the, 457. rocks, 409. 

 description of, along the line of Orthoceratites, description of new species, and re- 



the Birmingham and Gloucester railway, 547. marks on previously established species from the 

 unconformable stratification in Rhenish provinces, 344. 



the upper and lower divisions, presented in the distribution of, in Palaeozoic strata 



Lickey cutting, 547. 326. 



Newton, notice of the carbonaceous deposits near. Ossiferous caves and fissures, remarks on the origin 



458. of, and on the animal remains found in, at Kent's 



coral limestones, description of the, 463. Hole, &c., 443. 



list of fossils found in, 466. Osterode, description of the section from, to Claus- 



Nimphi, notice of gold and silver mines at, 7. thai, 288. 



Nordberg, section of the slate quarries of, 290. Oxford clay, description of, on the Yorkshire coast, 



Normandy, notice on the general structure of, rela- 148, 150. 



tive to the connexion of granite, quartz-rock, and list of fossils found in, 149 et seq. 



schists, 564. common to other for- 



Nummulitic limestone, notice of, in Western Asia mations, 149. 



Minor, 13. Owen, R. Esq., description of remains of Chaeropo- 



tamus, Palaeotherium, Anoplotherium, and Dicho- 



O 



bunes, from the Isle of Wight, 41 . 



Oberscheld, description of the limestones of, 246, 254. observations on the fossils represent- 



