562 
INDEX. 
335; Russia, 310, 367; Scotland, 331 ; 
Spain, 419 ; Spitzbergen, 368. 
Petherwin, 272, 279. 
Petraia bina, 219. 
subduplicata, 90, 189. 
Petroleum, 258, 305 ; in North America, 
443. 
Petschora, 359. 
Phacops apiculatus, 69. 
conophthalmus, 206. 
Downingise, 235. 
granulatus, 279. 
truncato-caudatus, 68. 
Phillips, Mr. J. A., 456. 
Phillips, Mr. John, 463. 
Phillips, Mr. W., and Eev. W. B. Cony- 
Phillips, Prof. J., 6, 7, 16, 33, 34, 45, 91, 
94-98, 110, 113-117, 126, 134, 148, 175, 
186, 205, 228, 230, 231, 234, 284, 291, 
300, 334, 503. 
Phillipsia pustulata, 299. 
Phosphoric acid in rocks belowthe Silurian 
deposits, absence of, 28, 537. 
Phyllograptus angustifolius, 541. 
PickweU, 272. 
Pilhet, M., 423. 
Pilton, 272, 280. 
Plants, first appearance of terrestrial, 478. 
Plants from the Carboniferous formation, 
286 ; Coal-measures, 300 ; Devonian 
rocks of Ireland, 283 ; Old Eed Sand- 
stone, 268 ; Permian rocks, 336. 
Platyschisma helicites, 162. 
Platysomus striatus, 342. 
Play, M. le, 415. 
Playfair, Dr. Lyon, 148, 450. 
Pleta of Esthonia, 358. 
Pleurorhynchus aequicostatus, 228. 
aliformis, 299. 
dipterus, 196. 
Plieninger, Dr., 482. 
Plumpton rocks, 329. 
Poland, Devonian rocks of, 364 ; Palaeozoic 
rocks of, 370. 
Polypora? (Hornera) crassa, 216. 
Polyzoa from the Lingula-flags, 46 ; Llan- 
deilo formation, 51 ; Lower Silurian 
rocks, 188 ; Permian rocks, 336 ; Upper 
Silurian rocks, 216. 
Pontefract rock, 329. 
Pont Ladies, 55. 
Porambonites Capewelli, 226. 
Portlock, Gren., 173, 183, 186, 197, 335. 
Portugal, Palaeozoic rocks of, 17, 419. 
Potsdam group in British North America, 
435. 
Potsdam Sandstone, 427 ; footmarks in 
the, 206. 
Powis Castle, 80. 
Powrie, Mr. J., 239, 251, 261, 542. 
Prado, Don Casiano de, 17, 415-419. 
Pratt, Mr. S. P., 418. 
Presteign, Lower Wenlock Limestone at 
Corton, near, 107. 
Prestwich, Mr. J., 300. 
Prestwichia rotundata, 298. 
Primordial zone in Bohemia, 372 ; British 
North America, 435 ; France, 407 ; Nor- 
way and Sweden, 350, 354 ; Spain, 416. 
Primordial zone of England, fossils of the, 
96, 541 ; strata beneath the, 22, 32 ; the 
base of the Silurian system, 480; the 
equivalent of the Lingula-flags, 47. 
Pring, Mr. J. D., 272. 
Productus giganteus, 299. 
horridus, 339. 
scabriculus, 300. 
Proetus latifrons, 235. 
Progression in organic beings, 483. 
Protaster Miltoni, 127. 
Sedgwicki, 225. 
Protichnites Scoticus, 151. 
Prunocystites Fletcheri, 222. 
Przibram, 371. 
Pseudocrinites magnificus, 222. 
quadrifasciatus, 222. 
Pteraspis Banksii, 240. 
truncatus, 240. 
Pterichthys cornutus, 262. 
Pterinea asperula, 228. 
? planulata, 228. 
tenuistriata, 228. 
Pteropoda from the Llandeilo formation, 
48, 51 ; Lower Silurian rocks, 199. 
Pterotheca transversa, 199. 
Pterygotus Banksii, 239. 
bilobus, 162. 
Ludensis, 140. 
, sp., 141. 
Ptilodictya acuta, 188. 
dichotoma, 189. 
lanceolata, 216. 
scalpellum, 217. 
Ptychophyllum patellatum (Strombodes 
plicatum), 219. 
Pusyrewski, Prof., 550. 
Qualen, Major Wangenheim von, 343. 
Quantock Hills, 274. 
Quarries in the Wenlock limestone, 116. 
Quebec group, 353 ; in British North 
America, 436. 
Quekett, Prof., 269, 356. 
Radnorshire, Lower Wenlock Limestone 
of, 107 ; Tarannon shales and Denbigh- 
shire grits of, 102; Upper Llandovery 
rocks of, 88. 
Ragleath, 64. 
Eamsay, Prof. A. C, 7, 8, 14, 19, 31, 36, 
42, 57, 59, 71, 73, 82-84, 103, 160, 166, 
171, 333, 334, 343, 427, 428, 434, 450, 
498, 546. 
Randall, Mr. J., 69, 246, 549. 
Raphistoma aequalis, 197. 
Rastrites peregrinus, 61. 
maximus, 541. 
Ravines, formation of, 497. 
Readwin, Mr., 450. 
