620 
INDEX. 
ANTRIM. 
Antrim, Chalk altered by a dike in, 516. 
-, Lower Miocene, volcanic rocks of, 
539. 
Antwerp Crag, 204. 
Apateon pedestris, a carboniferous reptile, 
406. 
Apatite, 500. 
Apennines, Northern, metamorphic rocks 
of, 599. 
Apes, fossil of the Upper Miocene, 215. 
Apiocrinites rotundus^ Bradford, 343. 
Appalachians, long lines of flexures in, 
92, 93. 
-, vast thickness of successive strata in, 
110 . 
Aptijchus, part of ammonite, 336, 
Aqueous rocks defined, 27, 35. 
Araucaria sphcerocaypa. Inf. Oolite, 348. 
Arbroath, section of Old Red at, 74. 
Archceopteryx macrura^ Solenhofen, 338. 
Archegosaurus minor and A, medius, coal 
measures, 406, 407. 
Archiac, M. de, on nummulites, 277. 
-, on chalk of France, 306. 
Arctic Miocene Flora, 239. 
Area of the Wealden, 319. 
Areas, permanence of continental, 117. 
Arenaceous rocks described, 35. 
Arenicolites linearis^ Arenig beds, 475. 
Areuig or Stiper-Stones group, 474. 
-, volcanic formations of, 549. 
Argile plastiqne, 276. 
Argillaceous rocks described, 36. 
Argillite, Argillaceous schist, 579. 
Argyll, Duke of, on Isle of Mull leaf-beds, 
247. 
Armagh, bone-beds in Mountain Lime¬ 
stone at, 437. 
Arran, amygdaloid filled with spar near, 
518. 
-, erect trees in volcanic ash of, 546. 
-, Greenstone dike in, 514. 
Arthur’s seat, trap rocks of, 545. 
Arvicola, tooth of, 165. 
Asaphus caudatus, Silurian, 467. 
- tyrannus, A. Buchii, 474. 
Ascension, lamination of volcanic rocks 
in, 595. 
Ash, Mr., on fossils of Tremadoc beds, 
483. 
Ashby-de-la Zouch, fault in coal field of, 
91. 
Aspidura loricata, Muschelkalk, 379. 
Astarte horealis{=A. arctlca—A. com- 
pressa), 176. 
- Omalii, Crag, 199. 
Asterophyllites foliosus. Coal, 425. 
Astra7igia lincata {A^ithophyllum Imea- 
tu7n), 229. 
Astrma hasaltifoi'me, Carboniferous, 432. 
Astropecte^i crispatus, Loudon clay, 266. 
Atherfield clay, 309. 
Atlantic mud, composition of, 287. 
Atrypa 7'eticularis, Aymestry, 462. 
Atm'ia ziczac {Nautilus ziczac), 266. 
Augite, 499, 502. 
Auricula, recent, 55. 
Austen, Mr. Godwin, on marine deposit of 
Selsea Bill, 182. 
-, on boulders in chalk, 292. 
Australian cave breccias, 158. 
Australia, auriferous gravel of, 617. 
BELEMNITES. 
Auvergne, alluvium in, 100. 
-, chain of extinct volcanoes in, 495. 
-, granite veins in, 610. 
-, Lower Miocene of, 233. 
-, Miocene volcanic rocks of, 540. 
—-, Post-pliocene volcanic eruptions in, 
527. 
-, springs from spent volcanoes in, 604. 
Aveliue Mr., on Taraunon shales, 468. 
Avicula co7ito7da, Rhaetic beds, 360. 
-— cygnipes, Lias, 355. 
- incequivalvis, Lias, 355. 
- socialis, Muschelkalk, 379. 
Aviculopecten papyraceus, coal measures, 
* 405. 
- suhlobatus, mountain limestone, 434. 
Aymestry Limestone, 461. 
Azoic period, supposed, 603. 
Azores, Miocene lavas with shells, 539. 
BACILLARTA paradoxa, 51. 
Baculites anceps. Lower Chalk, 298. 
- Fauiasii, chalk, 286. 
Baiiin’s Bay, formation of drift in, 171, 
173. 
Bag-shot sands, 258, 259, 262. 
Baiae, Bay of, subterranean igneous action 
in, 569. 
Bakewell, Mr., on cleavage in Swiss Alps, 
590. 
Bala and Caradoc beds, 470. 
Balistidce, defensive spine of, 261. 
Bangor, or Longmynd group, 485. 
Ba^iksia, seedaiid fy'uit of, Lower Miocene, 
238. 
Barmouth sandstones, 486. 
Barnes, Mr. J., on insects in American 
coal, 416. 
Barnstaple, Upper Devonian of, 450. 
Barrande, M. Joachim, his “Primordial 
Zone,” 471, 482, 487. 
-, on metamorphosis of trilobites, 471. 
Barrett, Mr., on bird in Blackdowu beds, 
299. 
Barton series sands and clays, 258. 
-shells, percentage of, common to 
London clay, 258. 
Basalt, columnar, 511. 
-, composition of, 504. 
Basaltic rocks, poor in silica, 504. 
-, specific gravity of minerals in, 504. 
Basilosaiu'us^EiOCowe, United States, 280* 
Basset, term explained, 83. 
Basterot, M. de, on Bordeaux tevtiary 
strata, 141. 
Bath Oolite, 342. 
Batrachian reptiles in coal, 406. 
Bay of Fundy, denudation in coalfield in, 
418. 
Bean, Mr., on Yorkshire Oolite, 350. 
Bear Island carboniferous flora, 441. 
Beaumont, M. E. de, on island in Creta¬ 
ceous sea, 305. 
-, on mineral veins, 613. 
-, on Jurassic plutonic rocks, 571. 
-, on formation of granite, 553. 
Beckles, Mr. S. H., on foot-prints in Hast¬ 
ings sands, 315, 330. 
-on Mammalia of Purbeck, 326. 
Belemiiitella mucronata, Chalk, 283. 
Belemnites hastatus, Oxford clay, 340. 
- Puzosia7ius, Oxford clay, 341. 
