758 



INDEX. 



Organic remains of northern drift (modern sea-shells), 533. 



of ancient alluvia, 552, 555. 



of the Inferior Oolite, 15. 



■ of the Upper Lias shale, 1 6. 



of the Marlstone (Lias), 17, 23, 449. 



— of the Lower Lias shale, 18, 24. 



— — of the limestone of the Lower Lias shale, 20. 



of the Keuper Sandstone, 30, 44, 64, and Ap- 

 pendix. 



■ of the Muschelkalk, 38. 



— ■ of the Upper New Red Sandstone (Bunter 



Sandstein or Gres bigarre), 43. 

 of the Magnesian Limestone, xxviii. (red marls 



of), 50. 



of the Lower New Red Sandstone, xxviii. 56. 



of the upper Coal Measures and freshwater 



limestone, 84 et seq., 100. 

 of the ordinary Coal Measures, 103 et seq., 



116, 148 etseq., 379, 380, 474. 

 of the Carboniferous Limestone, 106, 119, 146, 



157, 167, 161, 384. 

 of the Old Red Sandstone (conglomerates of), 



175. 



■ of the Old Red Sandstone (cornstone fishes of) 



180 (PL 1, 2, 2 bis.), 587 et seq. 



of the Old Red Sandstone (tilestones), shells 



of, 183 (PI. 3.), 602. 



of the Silurian System, general description of, 



579 et seq., 645 et seq. 



-of the Upper Ludlow Rock referred to,198e^se§'., 



300, 311, 315, 338 etseq., 390, 410, 430, 446, 454, 481. 



, fishes of described 



(PI. 4.), 605 et seq. 



, shells of described 



(PI. 5.), 608 et seq. 



, trilobites of described 



(PI. 7.), 651 etseq. 



of the Aymestry Limestone referred to, 202 



et seq., 243, 338, 340, 430, 446, 482. 



, shells of de- 

 scribed (PI. 6.), 613. 



— of the Lower Ludlow Rock referred to, 206, 



302, 315, 340, 349, 430, 439. 



, shells and trilo- 

 bites described (PI. 7—11), 616 et seq., 652 et seq. 



of the Wenlock Limestone and shale referred 



to, 214 etseq., 313, 349, 393, 430, 440, 445, 489, 492. 



, shells of de- 

 scribed (PI. 12, 13.), 622—633. 



— — , corals of, and 



Lower Silurian Rocks described (PI. 15, 15 bis, 16, 16 bis.), 

 6. 



of the Caradoc Sandstone referred to, 217 et 



seq., 305 etseq., 351 et seq., 393, 415, 441, 457, 494. 



, shells of described 



(PL 19—22.), 635—643. 



, trilobites of de- 

 scribed (PL 23.), 659—662. 



of the Llandeilo Flags referred to, 222, 270, 



307, 326, 332, 355 et seq., 394, 397. 



— — , shells of described. 



See Caradoc shells. 



1 trilobites of described 



(PL 24, 25.), 662 et seq. 



Organic remains, Silurian nondescripts (PL 26.), 696. 



of the Upper Cambrian Rocks, 308, 363 et 



seg. (PL 27.), 699. 

 Origin of the Silurian System, 3 et seq. 

 of coal, 98, 148. 



of mineral springs. See Mineral Springs. 



Orkney Isles, fishes in Old Red Sandstone of, 601. 

 Orlanton, Pembrokeshire, Lower Silurian Rocks, 395. 

 Orleton Hall, near Wellington, shells in gravel, 532. 

 Osteolepis, fossil fish in Old Red Sandstone, 589, 601. 

 Ostorius, wars with the Silures, xxxi. 

 Oswestry, western boundary of New Red Sandstone, 28. 



, coal worked through Lower New Red Sandstone, 64, 



141 et seq. 



, millstone grit near, 144, 145, 452. 



, dislocations of coal-field, 147, 148. 



, general section of (PL 30. f. 14.), 715. 



■ ■ — , fossils of carboniferous limestone, 161. 



, northern drift near, 529, 530. 



coal-field, origin of, 98 ; extent of, 571. 



Outliers, of Lias in Gloucestershire and North Shropshire, 13, 17, 

 22. 



of Carboniferous Limestone, 162, 184. 



of Old Red Sandstone, 190 et seq. 



of Silurian Rocks, 231, 240. 



Oxenton Hill, Gloucestershire (marlstone), 17, 18. 

 Oxfordshire, oolitic series of, 13, 16. 



Pacific Ocean, icefloes in, with sketch, 541. 

 Pain's Castle, Radnorshire, Upper Ludlow Rock (PL 31. f. 1.), 

 312, 716. 



■ , fossils at, 610 et seq. 



Pakeades. See Trilobites. 



Palmer's Cairn, Ludlow, Aymestry limestone (wood-cut), 203, 

 408. 



, fossils at, 614 et seq. 



Pant-dreinan, Caermarthenshire, basins of Lower Silurian Rocks, 

 350. 



Panti-phiUip, Pembrokeshire, cleavage and beds coincide (wood- 

 cut), 400. 



Paradoxides, genus of crustaceans, 650, 658, 415. 

 Parallelism of the mountain chains of Siluria, 568. 



does not always prove contemporaneity, 570. 



Park Wells, near Builth, mineral springs and their origin (wood- 

 cut), 334. 



Parkau, Pembrokeshire, flaglike and calcareous strata, 390. 



Parker, Mr., of Sweeny Hall, Salop, 142. 



, Rev. John, drawing by, 268. 



Parkinson, Mr., on Organic Remains, 646. 



Passage, or transition, of the lias into the red or saliferous 

 marls (Keuper), 19, 28 et seq., 449. 



of the Lower New Red Sandstoneinto the Coal Measures, 



57, 60 et seq., 79, 81 et seq., 132, 467. 



of the Carboniferous Limestone into the Old Red Sand- 

 stone, 79, 121, 160, 171 et seq., 384. 



of the Old Red Sandstone into the Silurian System, 181, 



183, 192, 196, 300, 311, 336 et seq., 347 et seq., 375, 381, 

 384, 390 et seq., 409 et seq., 438, 455. 



of the Lower Silurian Rocks into the Cambrian System, 



307, 308, 352, 357, 359, 375, 394, 398, 573. 



of intrusive into bedded trap rocks, 277, 327. 



Patrickson, Major, on a raised beach in Ireland, 547. 



Pea grit, local name of a stratum of Inferior Oolite, 15. 



Peat, formation of, 559. 



