672 



GENERAL INDEX. 



649 ; Boulder-clay of, 654 ; mo- 

 raines of, 658 ; erratics of, 659. 



OmitJiopsis, Mr. J. W. Hulke on the 

 vertebras of, 31. 



Orthacanthus, Mr. J. W. Davis on, 

 321. 



Orthoceras cylindraceum, 583. 



Ostracacanthus dilatatus, 64. 



Oxford, Mr. J. W. Hulke on Iguanodon 

 Prestwichii from the Kimmeridge 

 Clay of Cumnor Hurst, near, 433. 



, Prof. J. Prestwich on the oc- 

 currence of a new species of Igu- 

 anodon in the Kimmeridge Clay at 

 Cumnor Hurst, near, 430. 



sewage-farm, Mr. E. S, Cobbold 



on the strata exposed in laying out 

 the, 314. 



Oxfordshire, Portland rocks of, 213. 



Owen, Prof., on the skull of Argil- 

 lornis longipenms, 23. 



, on parts of the skeleton of an 



Anomodont reptile {Platypodosau- 

 rus rohustus) from the Trias of Graaf 

 Eeinet, S. Africa, 414. 



Palasolithic implements, manufactory 

 of, at Crayford, 544. 



Peach, B. N., Esq., and J. Home, Esq., 

 on the glaciation of the Orkney 

 Islands, 648. 



Pecten Morini, 234. 



Peldar-Tor district, 341. 



Penryn, enclosures in granite of, 7. 



Permian cupriferous sandstones, up- 

 per, Mr. W. H. Twelvetrees on a 

 new Theriodont reptile fro;n the, 

 of Kargalinsk, near Orenburg, 540. 



-Peterhead, inclusions in granite from, 

 13. 



Phillips, J. A., Esq., on concretionary 

 patches and fragments of other rocks 

 contained in granite, 1, 



Pittenweem and Anstruther section 

 in the calciferous sandstone series, 

 560. 



, sections of calciferous sand- 

 stone strata, near, 568, 571. 



JPlatypodosaurus rohustus, Prof. Owen 

 on, from the Trias of Graaf Eeinet, 

 S. Africa, 414. 



Pleistocene and Pliocene periods, 

 magnitude of the break between 

 the, 396. 



Mammalia, 395. 



JPleuracanthus, Mr. J.W. Davis on, 321. 



cdatus, 329. 



alternidentatus, 328. 



cylindricus, 331. 



. denticulatus, 334. 



erectus, 326. 



Pleuracanthus IcBvissimus, 325^ 



■ planus, 329. 



327. 

 rohustus, 330. 



tenuis, 327. 



Wardi, 334. 



Pleurophorus elegans, 586. 



PUcatula echinoides, 233. 



Pliocene and Pleistocene periods, 



magnitude of the break between 



the, 396. 

 Mammalia, 391. 



period, newer, in England, Mr. 



S. V. Wood, jun., on the, 457. 



Poole, H. S., Esq., on the gold-leads 



of Nova Scotia, 307. 

 Porphyrite of Bohemia, 599. 

 Portland, Isle of, Portland rocks of, 



190. 



rocks, Eev. J. F. Blake on 



the, of England, 189. 



Portlethon, mica-schists of, Proc. 90. 



Poulton, E. B., Esq., on mammalian 

 remains and tree-trunks in Quater- 

 nary sands at Beading, 296. 



Precambrian group, Mr. C. Callaway 

 on a second, in the Malvern Hills, 

 536. 



rocks of the North-western 



and Central Highlands of Scotland, 

 Dr. Hicks on the, Proc. 10 1. 



of Bohemia, 592; compared 



with those of Britain, 601. 



Precarboniferous rocks, Eev. E. Hill 

 and Prof. Bonney on the, of Charn- 

 wood Forest, 337. 



Predevonian rocks of Bohemia, Mr. 

 J. E. Marr on the, 591. 



Prehistoric Mammalia, 400. 



Prestwich, Prof. J., on the occurrence 

 of a new species of Iguanodon in a 

 brick-pit of the Kimmeridge Clay 

 at Cumnor Hurst, three miles 

 W.S.W. of Oxford, 430. 



Pribram, section through, 594. 



Primordial ocean, Mr. E. Mallet on 

 the temperature of the, 112. 



Protospongia, Mr. J. W. SoUas on the 

 genus, 362. 



Protospongia fenestrata, 363. 



Psephophorus polygonus. Prof. H. Gr. 

 Seeley on, 406. 



Pumice, fragments of, filled with a 

 green mineral, Proc. 80. 



Purbeck and Portland rocks at Swin- 

 don, sections of, 205. 



Purple-clay of Yorkshire, 507. 



Pycnodus pagoda, 228. 



Quartz, deposition of, on sand-grains, 

 Proc. 62. 



