724 



GENERAL INDEX. 



ham, constitution of, 11 ; analysis 

 of, 21, 



Minera and Llangollen, high - level 

 deposits between, 350. 



Mochlodon Suessii, 624. 



Moel Morfydd, section from Nant 

 Llechos, near Corwen, to, 487. 



Moel Tryfan, shelly deposits of, 351 ; 

 deposition of, during submergence, 

 353 ; identification of local and 

 erratic stones in, 353 ; arrangement 

 of the gravel and sand in, 353 ; 

 position of boulders in, 354; bent 

 and shattered edges of slaty laminae 

 in, 354, 368 ; origin of shells of, 

 355 ; section of laminated sand and 

 bent slates on, 355. 



Moel-Tryfan shelly deposits and simi- 

 lar high-level deposits on the Welsh 

 mountains, Mr. Mackintosh on the, 

 351. 



Montana, U. S. A., Mr. F. Eutley on 

 the vitreous rocks of, 391. 



, Mr. J. Eccles on some volcanic 



rocks of, 391. 



, microscopic characters of vol- 

 canic rocks from, 398. 



Moore, C, Esq., on abnormal geologi- 

 cal deposits in the Bristol district, 

 67. 



Morben quarry, Machynlleth, fruits 



from, 153. 

 MucroneUa duplicata, 328. 



elegans, 329. 



mucronata, 328. 



Murchison Fund, presentation of the 



Balance of, to Frank Eutley, Esq., 



Proc. 34. 



Murchison Medal, presentation of, 

 to Prof. Archibald Geikie, Proc. 

 29. 



Mynydd Llwydiarth, gneiss of, 212. 

 Mynydd Mechell, chloritic schists of, 

 222. 



Nant Cader, section through, 159. 

 Nant Llechos, near Corwen, section 



from, to Moel Morfydd, 487. 

 Nari series, 195 ; Corals of, 200. 

 Nebo, 220. 



Nemacanthus minor, 419. 



Nematophycus Hicksii, 494. 



Neocomian rocks, Prof. Seeley on a 

 small Lizard from the, of Comen, 

 near Trieste, 52. 



Nettlebury Quarry, 78. 



Neue Welt, Prof. Suess on the Gosau 

 beds of the, 702. 



Neuvizy, map of country near, 502. 



New Brunswick, plants from the De- 

 vonian of St. John, 303. 



New Forest, Brockenhurst zone in the, 

 109. 



New York, plants from the Devonian 



of, 299, 303. 

 Nicols Eiver, British Columbia, 273. 

 Nievre, Upper Jurassic rocks of, 537. 

 Normandy, Upper Jurassic rocks of, 



547. 



Northern area of Anglesey, 221. 

 North-western area of Anglesey, 224. 



Oborne, near Sherborne, vertical sec- 

 tion of Inferior Oolite at, 589. 



Obsidian, devitrified, 405, 411. 



Obsidian from the Yellowstone dis- 

 trict, 392; black, 391 ; felspar crys- 

 tals in, 392; black spherulitic, 393 ; 

 spherulitic-banded, 393 ; black por- 

 phyritic, 394. 



Obsidian from Tolcsva, Hungary, 406. 



Obsidian tuff, areas of depolarization 

 fromstrain in perlitic bodies in, 396. 



Odontocaulis Keepingii, 176. 



Odontopteris squamosa, 305. 



Okanagan valley, British Columbia, 

 273, 275. 



Oldham, Mr. Hollingworth on a peat 

 bed inter stratified with the Boulder- 

 drift at, 713. 



Oligosaurus adelus, 678. 



Oolite, Mr. J. Buckman on some Am- 

 monites from the Inferior, of Dorset 

 and Somerset, 57. 



, Inferior, of Dorset, Mr. S. S. 



Buckman on some Ammonites from 

 the, 588. 



and Lias, Mr. G. E. Vine on 



Diastoporidas from the, 381. 



Oolitic remains at Westbviry-on-Trym, 

 77. 



Oppelia subcostata, 606. 



subradiata, 606. 



Truellii, 606. 



Ormskirk, constitution of Sandstones 

 from Town Green, near, 14. 



Orne and Sarthe, Upper Jurassic rocks 

 of the, 547. 



Ornithocheirus Biinzeli, 701. 



Ornithomerns gracilis, 671. 



Osborne Beds at Cliff End, 104. 



Owen, Prof., on the parts of the Ske- 

 leton of an Anomodont Eeptile 

 {Platypodosaurus robustus, Owen), 

 Part II. The Pelvis, 266. 



, on the Order Therodontia, with 



a description of a new genus and 

 species {Mlurosaurus felinus, Ow.), 

 261. 



Oxfordian of the Paris basin and 



England, 567. 

 Pachytheca, 484, 492, 



