756 



INDEX. 



Milne, Edwards, Dr., references to observations on corals, 2 edit., 



Lamarck, 675 et seq. 

 Moccas, Herefordshire, hills of Old Red Sandstone and cornstone, 



177. 



Mocktree Forest, Salop, LudlowRocks of,xxxi. 197,201,203,207. 



— , dislocations of, 237. 



, fossils of, 610, 614 et seq. 



, fragments drifted from, 514. 



Moel-ben-tyrch, Montgomeryshire, Cambrian boundary, 309. 

 Moel-fabau, Bangor, shells with granite pebbles, 534. 

 Moel-fre, Builth, Ludlow Rocks, 340. 

 Moel-y garth, Montgomeryshire, Caradoc formation, 305. 



, fossils at, 638 et seq. 



Moel-y-golfa, Breidden Hills, trap and veined Silurian Rocks, 

 289 et seq. 



, axis of, through New Red Sandstone, 296. 



Moel-tryfan, Caernarvonshire, bowlders and shells, 528, 544. 

 Mollusca, testaceous, require carbonate of lime, 89, 482. 

 Mollusks, fossil in the Old Red System (lowest beds), 602. 



■ Upper Ludlow Rock, 608. 



•— — ■ ■ Aymestry Limestone, 613. 



Lower Ludlow Rock, 616. 



■ . '- Wenlock Limestone, 622. 



. Wenlock Shale, 628. 



— — Lower Silurian Rocks, 636. 



Monmouth Cap, Herefordshire, 516. 



Monmouthshire carboniferous limestone, 156, 158, 159, 161. 



, Old Red System, 170—188. 



— — Silurian group of Usk, 438. 



fishes of Old Red Sandstone, 587. 



Mordiford, Hereford, Ludlow Rocks and Wenlock Limestone, 

 429, 432, 433. 



gorge, accumulations of conglomerate and gravel, 436. 



More, Mr., of Linley Hall, lead mines of, 263, 278, 279, 282. 

 Morton, Mr., Nat. Hist, of Northamptonshire, 243. 

 Morton Pool, Salop, 269. 

 Mosses, peat, formation of, 559. 

 Mostyn, Flintshire, coal, 148. 



Mountain chains in and around the Silurian Region, direction 



of, 568 et seq. 

 Mountain Limestone. See Carboniferous Limestone. 

 Mount Pleasant, Caermarthen, fossils at (see Pensarn), 638 et 



seq., 664. 

 Mont Blanc, 543. 

 Montgomery, vale of, 551, 552. 

 Montgomery, shell marl near, 564, 565. 



Montgomeryshire, volcanic grit and Silurian Rocks, 77, 141, 300, 

 301. 



. — ■ , same lines of strike and fissure, 406, 570. 



Montlosier, Count, " Les Volcans d'Auvergne,".69. 

 Mudstone, provincial name for Upper Silurian Rocks, 204. 

 Munslow, Salop, Upper Ludlow Rock and fossils, 610 et seq. 

 Mumbles, near Swansea, fossils of Carboniferous Limestone, 161. 

 Mudge, Lieut.-Colonel, Ordnance Maps, xxix. 

 Murchison, Mr., on the Oolite of Scotland and Brora coal, 13, 25. 



__ , on the Tyrolese Alps and bowlders, 544. 



. — and Sedgwick on the raised beaches of Devon and 



Cornwall, 59, 546. 

 and Lyell on the excavation of valleys in central 



France, 70, 522. 



_— — and Sedgwick on the Styrian Alps, 150, 545. 



on the Old Red Sandstone of Scotland, 



and Caithness schists, 182, 588, 599, 600, 661. 

 and Lyell on the Cantal, 375. 



Murchison, Mr., on the Geology of Cheltenham, &c, 527. 



denudation near Br ra, 537. 



, Mrs., drawings by, 347, 370, 382, 409, 447, 558. 



Murrayshire, fishes in Old Red Sandstone of, 601. 

 Muschelkalk, probable representative of in Shropshire, 37. 



of Germany, fossils of, 38, 44. 



absent in the South of France, 45. 



Musclewick Haven, Pembrokeshire, Llandeilo Flags (PI. 35. f. 11.), 

 394, 722. 



Mushett, Mr., on the Forest of Dean, 80, 159, 160. 

 Mwmfre Hills, Caermarthenshire, Lower Silurian Rocks, 352. 

 Mwrda River, near Oswestry, 142. 

 Mydrim, Caermarthenshire, calcareous flags of, 361. 

 Mynidd-bwlch-y-groes, Brecknockshire, tilestones of Old Red 

 Sandstone, 181. 



Mynidd-epynt, Brecknockshire, Old Red Sandstone (PL 31. f. 6.), 

 181, 717. 



— ■ , Upper Ludlow Rocks of, 340. 



Mynidd-moel, near Oswestry, passage from Millstone Grit into 



carboniferous limestone, 144. 

 Mynidd-myddfai, Caermarthenshire, Old Red Sandstone, 348. 

 Mynidd-myfwr, Oswestry, millstone grit, 144. 

 Myrianites, a new genus of Annelids, 700. 

 Mytton's Dingle, Salop, 285. 



Nantwich, basin of lias, 22, 32. 



Nant-y-caws, Caermarthenshire, quartzose Upper Silurian, 354 r 

 355. 



Nant-cribba, Montgomeryshire, &c. (wood-cut and PI. 32. f. 1.), 

 287, 288, 717. 



Nant-y-moen, Caermarthenshire, lead mines (PI. 34. f. 4.), 361, 



366, 367, 719. 

 Nant-y-redig, Caermarthenshire, Llandeilo Flags, 357. 

 Naples, volcanic eruptions on coast of, 70. 

 Narberth, (Err. Narbeth, text), Upper Silurian Rocks, 390. 



, section from, to the coal-field (PI. 35. f. 4.), 721. 



Nash, Pembrokeshire, trap, 403. 



Nash Mill, Pembrokeshire, Caradoc Sandstone, 395. 



Nash, Mr., history of Worcester, 31, 567. 



Nash Sear ridge, Radnorshire, outlier of Old Red Sandstone 



west of (wood-cut), 192, 718. 

 , Wenlock limestone, much altered (wood-cut), 313, 



321, 322. 



, organic remains, 624 et seq. 



■ , nucleus of trap probable, 314, 322. 



, great cavern of, 554. 



Navers, Clee Hills, carboniferous limestone faults, 118, 119, 120. 

 Necker M. L. A., " Voyage en Ecosse," '' Regne Mineral," 74. 



, dykes of Monte Somma (Vesuvius), 



235. 



Nedge Hill, Salop, calcareous conglomerates and Lower New 



Red Sandstone, 48, 62. 

 Nelson's Monument, Caermarthenshire, 349. 

 Nelly Andrew's Green, Salop, 301, 302. 

 Nemertites, new genus of Annelids, 701. 

 Nereites, new genus of Annelids, 700. 

 Ness Cliff, New Red Sandstone, 41, 297. 

 Netherton Canal, Dudley, volcanic grit at, 468. 

 Netherton Hill, coal crops out : trap beneath, 472, 499, 730. 

 Netherwood Hills, Salop, 253. 



New Red Sandstone, Upper (Keuper and Bunter Sandstein), 27. 



. — — , Lower (Rothe-todte-liegende), 54. 



System, general view of, 27, 450. 



, general section of (PI. 29. f. 1.), 28, 713. 



