INDEX. 



745 



Old red sandstone in the Forest of Dean, divisible 

 into three portions, 196. 



cornstone bed, 196. 



. middle or conglomerate bed, 



196. 



■ resemblance of, 



to the millstone grit, 197. 



' upper bed, 197. 



outliers of, 197. 



dislocations in, 198. 



description of near Gamrie, 



141. 



east of Antrim, 71. 



in the north- 



in Shallee 



Mountain, 63. 

 notices respecting, in the 



United -States, 59 note. 

 remarks on its connexion 



with the carboniferous formations, 34 



note. 

 account of lead vein in, on 



the north face of Shallee Mountain, 60. 

 and conglomerate, descrip- 



tion of, in the north-west portions of Mayo 

 and Sligo, 157. 



Old red system, the fossiliferous slates of Corn- 

 wall and the formations below the culm-mea- 

 sures of Devonshire, assigned to the, 691. 



Old water-pit in the Rough Park, section of, 

 4S0. 



Old work at Dawley, section of, 480. 



Ombersley, account of the new red sandstone 

 near, 340. 



Ooglit, notice of Orthocerata found at, 706. 



Oohte of the carboniferous limestone, description 

 of, between Moyne and Rathrea, 155. 



Ophiura Egertoni, description of, 1 74. 



distinction between, and O. 



Milleri, 174. 



Ore Point, description of the strata composing, 

 665. 



Organics, account of, in the Bermudas, 111. 



Organic Remains. See Fossils. 



Ormoceras, a genus of Orthocerata, described, 

 709. 



Orthocerata, on some species of, 705. 

 remarks respecting the probability 



of certain of them having been internal shells, 



711. 

 observations on a peculiarity in the 



septa of the chambers, 712. 



the state of pre- 



servation of, 713. 



• the forms of the 



animals inhabiting, and the duties performed 



by them, 713. 

 Osorno, outburst of, during the earthquake, of 



Feb. 1825, and in Nov. and Dec. 1835, 604. 



Jan. 1835, 611, 612. 

 Oversley Lower Lodge, section of keuper marls 



and sandstone at, 335. 

 Ourmia, account of the lake of, 564. 



analysis of the water, 564. 



Outard Bay, account of sediment suspended in 



the upper stratum of water of, 90. 

 Owen, R., Esq., observations respecting the fossil 



birds' bones found in the Tilgate strata, 



176. 

 . on the supposed 



identity of Mastodon Elephantoides and M. 



latidens, 276 note. 

 on the dislocation 



of the tail at a certain point observable in the 



skeleton of many Ichthyosauri, 511. 

 " description of a specimen of the 



Plesiosaurus macrocephalus, in the collection 



of Viscount Cole, 515. 

 ■ on a bone of a Mammifer found 



at Hinganghat, 558 note. 

 Ox Mountains, account of, 149 et seq. 

 description of the passes through, 



150. 



carboniferous 



limestone of, 154. 



• calcareous and 



argillaceous shell and grit of, 156. 



stone and conglomerate, 157. 



old red sand- 



quartz rock, 



gneiss, 159. 



