IXDEX. 



503 



Nelson on the calcareous rocks of 

 Bermuda, 383. 



Neocomian strata, 380. 



Neuroptera, 267, 422. 



Neuropteris Loshii (figure), 184. 



New red sandstone, or trias, posi- 

 tion and distribution, 427 ; or- 

 ganic remains, 429 ; footmarks, 

 429 ; magnesian limestone, 431 ; 

 Permian group, 431, 432. 



Niagara, falls of, retreat of the, 51. 



Nillsonia, 191. - 



Nodules, 158. 



Noeggerathia, 193. 



Nomenclature, chemical, 82. 



Non- fossiliferous rocks, 116. 



Norna, 264. 



North of England coal-field, 435 ; 

 Staffordshire coal-field, 436 ; 

 Wales coal-field, 436. 



Norwich crag, fossils of the, 356. 



Nothosaurus, 300. 



Nucleolites (figure), 225. 



Nucula, 419. 



Numenius, 312. 



Numida, 310. 



Nummulite, popular names in Ger- 

 many, 25. 



Nympheea, 195. 



Nympheacese, 195. 



O. 



ODONTOPLEURA, 263. 



Odontopteris minor (figure), 184. 



(Eger, 264. 



Ogygidse, 263. 



Old red sandstone, 427 ; identity 



of, in Hereford and Devon, 452. 

 Olenidze, 263. 

 Olenus, 263. 

 Olis, 313. 

 Oniscidse, 263. 

 Oniscus, 263. 

 Oolite, origin of the, 423. 

 Oolitic group, vegetation of the, 173 ; 



geographical distribution, 409 ; 



stages, character, and localities, 



410 ; fossils, 412 ; coal, 416 ; 



origin of the oolite and lias, 423. 



Ophidia, 302. 



Ophidians, 306, 



Ophis, 302. 



Ophiura, 419. 



Order and succession of rocks, 150 ; 



never inverted, 59. 

 Organic remains, Pictorial Atlas of, 



182 ; uses of their study, 207 ; 



their state of preservation, 208 ; 



Cuvier's arrangement of, and con- 

 sequent restoration of the forms of 



extinct animals, 370. 

 Orphnea, 264. 

 Orthoceras, 448. 

 Orthoptera, 268, 421. 

 Orycteropus, 333. 

 Osseous breccias, containing human 



remains, 341. 

 Ossiferous caverns, their various 



contents, 37, 337, 338. 

 Osteolepis, 282. 

 Ostracion, 279. 

 Ostrea, 368, 399, 413. 

 Otodus, 277. 



Otopteris acuminata (figure), 187. 

 Outliers, 152 ; the Isle of Sheppey 



an outlier of the London clay, 361. 

 Ovid, remarkable passage from, 



proving his acquaintance with the 



great leading principles of modern 



geology, 20. 

 Oxen, fossil, 320. 

 Oxford clay, 413. 

 Owen, Professor, on the microscope, 



72 ; on the macacus, 339, on the 



iguanodon, 406. 



P. 



PACHYDERMATA, 323. 



Pachypteris lanceolata (figure), 182. 



Pachytherium, 334. 



Pacific, coral formations of the, 216. 



Paguridse, 265. 



Painter, a knowledge of geology 



useful to the, 13. 

 Palseomys, 337. 

 Palaebatrachus, 304. 

 Palseoniscidse, 282. 

 Palsemonidse, 264. 



