630 
INDEX. 
LEPT^NA BEPRESSA. 
Leptcena de 2 Jressa, Wenlock, 466. 
- Moorei, Lias, 355. 
Level of surface altered by chauge of sub¬ 
terranean heat, 119. 
Lewis, hornblendic gneiss of, 601. 
Lias, tishes of the, 358. 
-, fossils of the, 354. 
-and Oolite, origin of the, 364. 
-, reptiles of the', 360. 
-, insects of the, 363. 
-, plants of the, 364. 
-, plutonic rocks of the, 571. 
-, subdivisions of the, 353. 
-, volcanic rocks of the, 544. 
Liebig, on conversion of coal into anthra¬ 
cite, 403. 
-, on origin of stalactite, 156. 
Liege, limestone caverns at, 156. 
Lightbody, Mr., on Lower Ludlow shales, 
461. 
Lignite, conversion of into coal, 403. 
Lima giganteum^ 354. 
- Hoperi, Chalk, 300. 
- spinosa, White Chalk, 294. 
Limagne d’Auvergne, Lower Miocene 
mammalia of the, 234. 
Limburg beds, 242. 
Lime, scarcity of, in metamorphic rocks, 
604. 
-in solution, source of, 69. 
Limestone, block of striated, 168. 
-, brecciated, 387. 
-of chemical and organic origin, 61. 
-, compact, 501. 
-, Hippurite, 304. 
-, magnesian, 387. 
-, metamorphic or crystalline, 579. 
-, Mountain, and its fossils, 430-438. 
-, striated, 168. 
LiwMcea longiscata, 55. 
Lingula beds, volcanic tuffs of the, 549. 
Lmgula Crediuri^ Permian, 388. 
Lingula Flags, fossils of the, 484. 
Lingula Dmnortieri, Crag, 200. 
- Leivisii, Ludlow, 462. 
Lingulella Davisii, 484. 
Lipari Isles, tufas in, 586. 
Liquidamhar europceum, 209. 
Lithrostrotion basaltiforme, Carboniferous, 
432. 
Lits coquilliers, 275. 
Littoral denudation defined, 102. 
Lituites giganteus, Ludlow, 463. 
Llanberis slates, 486. 
Llandeilo Flags, fossils of the, 473-475. 
Llandeilo formation, thickness of the, 475. 
- f Lower, 475. 
Llandovery Group, classification of the, 
468. 
-Rocks, thickness of the Lower, 469. 
Loam defined, 38, 153. 
Lodes, shells and pebbles in, 608. 
-. See Mineral Veins. 
Loess of fiuviatile loam described, 153. 
-, fossil shells of the, 154. 
Logan, Sir W.^ on Eozoon Canadense, 490. 
-, on Gaspe sandstones, 455. 
-, on Huronian and Laurentian, 490. 
-, on stigmaria in under-clays, 398. 
-, on thickness of Nova Scotia coal, 409. 
-, on thickness of Laurentian in Can¬ 
ada, 113. 
MAMMALIA. 
Loire, faluns of the, 211. 
London Clay, fossils of the, 204, 206. 
Longevity, relative, of mammalia and 
testacea, 162. 
Longmynd Group, fauna of the, 486. 
Lonsdale, Mr., on corals of America, 229. 
-, on Devonian fossils, 449. 
-, on Stonesfield slate, 345. 
-, on United States Miocene corals, 229. 
Lonsdaleia floriformis, Carboniferous, 432. 
Lowe, Rev, R. T., on Mogador shells, 537. 
Lubbock, Sir J., on the two stone-periods, 
147. 
Lucma serrata, Bracklesham, 262. 
Ludlow formation. Upper, 459; Lower, 
461. 
-, bone-bed of the Upper, 459. 
Lulworth Cove, dirt-bed of, 333, 
Lycett, Mr., on fossils of the Great Oolite, 
344. 
Lycopodiacese of Coal, 422. 
Lycopodium densum, living species, 423. 
Lym-fiord, mingled fresh-water and ma¬ 
rine strata of, 59. 
Lymnea caudata, Headon, 256. 
- longiscata, Bembridge, 253. 
Lynton Group of Devon, 454. 
MACLAREN, Mr., on Pentland Kills, 
volcanic rocks, 548. 
Macclesfield, marine shells 1,200 feet high 
at, 181. 
MacClintock, Sir L., on Atlantic mud, 287. 
MacCulloch, Dr., on Aberdeenshire gran¬ 
ite, 558. 
-, on basaltic columns in Skye, 510. 
-, on formation of hornblende-schist, 
582. 
-, on trap, 519. 
MacMullen, Mr. J., on Eozoon Canadense, 
491. 
Macropus atlas, lower jaw of, 158. 
- major (living), lower jaw of, 159. 
Madeira, beds of laterite in, 609. 
-, dike in valley in, 513. 
-, Pliocene leaf-bed and shells in lavas 
of, 532. 
-, Miocene volcanic rocks of, 536. 
-, wind removing scoriae in, 97. 
Maestricht beds and their fossils, 283. 
Mafiiotte, Don Pedro, cited, 538. 
Magas pumila. White Chalk, 294. 
Magnesian Limestone defined, 38. 
-and marl-slate, 387. 
Magnetite, 500. 
Maidstone, Upper Cretaceous fossils of, 
297. 
Malacolite, 502. 
Malaise, Professor, on Engihoul cave, 
157. 
Mammalia, anterior to Paris gypsum, ta¬ 
ble of, 329. 
-, extinct, coeval with man, 152,157. 
-, fossil, of Middle Purbeck, 325. 
-, fossil, in Pliocene in Val d’Arno, 
208. 
-, fossil, in the Crag, 193, 197. 
-, fossil, of Vienna basin, 225. 
-of the Limagne d’Auvergne, 234. 
-of Siwalik Hills, 227. 
-of the Stonesfield slate, 345. 
-, teeth of Postpliocene, 165. 
