INDEX 
The Fossils, the names of which are printed in Italics, are figured in the Text. 
ABBEVILLE. 
ABBEVILLE, flint tools of, 152. 
Aberdeenshire, granite of, 558. 
Abich, M., on trachytic roeks, 504. 
Acer trilohatum, Miocene, 220, 221. 
Acrodus nohilis, Lias, 359. 
Acrogens, term explained, 303. 
Acrolepis Sedgivickii, Permian, 390. 
Actceon acutus, Great Oolite, 345. 
Actmocijclas, in Atlantic mud, 288. 
Actinolite, 499,502. 
-schist, 578. 
^'Echw.odus Leachii, Lias, 358. 
Adiantites Hihernica, Old Red, 441. 
Agassiz on flsh of Sheppey, 207. 
—^ on fish of the Brown-Coal, 540. 
-on fish of Monte Bolca, 544. 
-on Old Red fossil fish, 443, 447. 
-on Silurian fish, 400. 
Age of metamorphic rocks, 597. 
-of Plutonic rocks, 504. 
-of strata, tests of, 123. 
-of volcanic rocks, 520. 
Agglomerate described, 509. 
Agnostus integer. A. Rex^ 488. 
Air-breathers of the Coal, 413. 
Aix-la-Chapelle, Ci-etaceoiis flora of, 302. 
Alabaster defined, 39. 
Alberti on Keuper, 370. 
Albite, 499, 500. 
Aldeby and Chillesford beds, 192. 
Alkali, present in the Palaeozoic strata, 587. 
Alpine blocks on the Jura, 169. 
Alps, age of metamorphic rocks in, 599. 
-, nummulitic limestone and flysch of, 
77. 
Alum schists of Norway and Sweden, 489. 
Alluvial deposits. Recent and Postplio¬ 
cene, 151. 
Alluvium, term explained, 99. 
-in Auvergne, 100. 
Alternations of marine and fresh-water 
strata, 72. 
Alum Bay beds, plants of the, 262. 
Amblyrhynchus cristatus, a living marine 
saurian, 362. 
America. /See United States, Canada, Nova 
Scotia. 
-, North, Glacial formations of, 182. 
-, South, gradual rise of land in, 72. 
--, Silurian strata of, 478. 
ANTICLINAL. 
American character of Low^er Miocene 
flora, 238. 
-forms in Swiss Miocene flora, 223. 
Amiens, flint tools of, 152. 
Ammonites hifrons, Lias, 356. 
- Braikenridgii, Oolite, 351. 
- Bucklandi, Lias, 356. 
- Deshayesii, Neocomian, 311. 
- Humpliresianus, Inf. Oolite, 351. 
- Jaso7i, Oxford Clay, 340. 
- Noricus, Speeton, 312. 
- macrocephalus, Oolite, 352. 
- margaritatus, Lias, 357. 
- planorbis^ Lias, 356. 
- Rhotomage7isis, Chalk marl, 298. 
Amphibole group of minerals, 499, 502. 
Amphistegma Hauerma, Vienna basin, 
225. 
Amphitherium Broderipii, in Stonesfleld, 
348. 
- Prevostii, Stonesfleld slate, 347. 
Ampullaria glauca, 56. 
Amygdaloid, 507. 
Analcime, 500. 
Anamesite, a variety of basalt, 504. 
Ananchytes ovatus, White chalk, 293. 
-, with crania attached, 49. 
A7icillaria subulata, Eocene, 57. 
A7ic7jloceras gigas, 309. 
- spmiger7im, Gault, 301. 
- Duvallei, Neocomian, 312. 
A7icylus velletia (A. elega7is), 55. 
Andalusite, 500. 
Andes, Plutonic rocks of the, 569. 
Andreasburg, metalliferous vein of, 611. 
Angelin, on Cambrian of Sweden, 489. 
Angiosperms, 303. 
-of the Coal, 429. 
Anglesea, dike cutting through shale in, 
514. 
A7iodo7ita Co7'die7'ii, 54. 
- Jukesii, Upper Old Red, 441. 
- latimargmata, 54. 
A7ioplothermm comnmme, Binstead, 254. 
- gracile, Vm'\s basin, 271. 
Anorthite, 499, 501. 
A n7iularia sphenoj^hylloides, Coal, 425. 
A7itholithes, coal-measures, 429. 
Anthracite, conversion of coal into, 403. 
Anticlinal and synclinal curves, 74,85. 
