INDEX. 
\The fossils here enumerated are those illustrated by figures in the text.] 
Abereiddy Bay, Lower Silurian rocks in, 
53. 
Abich, M., 27, 307, 368. 
Acervularia ananas, 220. 
Acidaspis Barrandii, 235. 
bispinosa, 206. 
Brightii, 235. 
Acroculia haliotis, 224. 
Acton, Mrs. Stackhouse, sketch by, 64. 
Adiantites (Cyclopteris) Hibernica, 283. 
iEglina binodosa, 48. 
grandis, 51. 
mirabilis, 174. 
Africa, Palaeozoic rocks of, 17. 
Agassiz, Prof., 252, 258, 259, 298, 304, 
343, 486. 
Agelacrinites Buchianus, 191. 
Agnostus Maccoyii, 51. 
princeps, 43, 45, 51, 203. 
trinodus, 204. 
sp., 51. 
Aikin, Mr. A., 65. 
Albertite, 256. 
Alison, Sir A., sketch by, 149. 
Alps, Palseozoic rocks of the, 369. 
Altenstein, 321. 
Alum-slates of Norway and Sweden, 62, 
346. 
Alveolites Labechii, 119. 
(Stenopora) fibrosus, 189. 
Ambonychia Triton, 196. 
America, gold in, 468; minute Silurian 
fossils of, 546; Palseozoic rocks of, 
18, 434; of British North, 434; of 
North-western and Arctic, 439 ; petro- 
leum in North, 443 ; table of the order 
of superposition of the Palseozoic rocks 
of North, 446. 
Ampyx nudus, 206. 
prasnuntius, 203. 
Anderson, Dr. J., 265, 266. 
Anderson, Mr. Gr., 264. 
Andrews, Prof., 444. 
Angelin, M., 44; 202, 347, 350, 354, 379. 
Angelina Sedgwickii, 51, 203. 
Anglesea, metamorphosed Cambrian rocks 
of, 35. 
Annelide-burrows in Cambrian rocks, 28 ; 
in the Stiper Stones, 40. 
Annelide-tracks from the Lower Silurian 
rocks, 201. 
Annelide-tubes from the North-western 
Highlands of Scotland, 166. 
Ansted, Prof. D. T., 297, 450. 
Anthracosia acuta, 300. 
Anticosti, 434 ; Silurian fossils of, 545. 
Apiocystites pentremitoides, 222. 
Applecross, 172. 
Arachnophyllum (Strombodes) typus, 219. 
Arbroath flagstones, 251, 265. 
Archiac, M. d', 394, 407, 418. 
Arctic America, Palasozoic rocks of, 439. 
Arctic regions, Palasozoic rocks of the, 19. 
Arenicolites didyma, 28. 
Arkose, 347. 
Asaphus expansus, 357. 
(Isotelus) gigas, 174. 
(Isotelus) Homfrayii, 203. 
Powisii, 204. 
tyrannus, 51. 
Ascoceras Barrandii, 233. 
Ash, Mr. J., 46. 
Ash, volcanic, 77. 
Astacodermata, 542. 
Atkinson, Mr. T. W., 368. 
Atrypa desquamata, 278. 
Grayii, 226. 
hemisphasrica, 90. 
reticularis, 90. 
Atthey, Mr., 302. 
Auchenaspis Salteri, 140. 
Aushkul, Southern Ural, Lake of, 454. 
Austin, Major, 222. 
Australia, gold in, 460 ; Palasozoic rocks 
of, 18. 
Aveline, Mr., 31, 89, 102, 103; see also 
G-eological Survey of Great Britain, 
passim. 
Avicula Danbyi, 228. 
Avon, valley of the, 497. 
Aymestry Limestone, 128. 
Ayrshire, coal-field of, 292 ; Old Eed Sand- 
stone of, 250 ; Permian rocks of, 332 ; 
Silurian rocks of, 155. 
Baggy Point, 272, 279. 
Bailey, Prof, 438, 439. 
Baily, Mr. W. H., 29. 
Bain, Mr., 17. 
Bala formation in Wales, 70 ; supporting 
conformably the Tarannon shales and 
Denbighshire grits, 102. 
Ballochmyle, Ayrshire, 332. 
Banffshire, Old Red Sandstone of, 262. 
Banks, Mr. R., 138, 139, 238, 240. 
Barkly, Sir H., 464. 
