574 



INDEX. 



Atrypa, range of, in Palaeozoic rocks, 320. 



Austen, R. A. C. Esq., on the geology of the south- 

 east of Devonshire, 433. 



Avicula, description of a new species from PafFrath, 

 373. 



Avon, notice of the marine erratic gravel near the, 

 in Worcestershire, 554. 



Azani, account of the lacustrine basin of, 17. 



list of shells found in, 17. 



B. 



Babbacombe, notice of the trap near, 470. 

 Barton, notice of the limestone of, 463. 

 Basalt, description of, near Lisbon, 124. 

 geological period of ejec- 

 tion of the great mass north of the Tagus, 125. 

 effects produced by, on 



the strata, 125. 

 notices of its disturbing effects in Cascaes 



Bay, 125. 

 notice of detached masses of, 1 26. 



Basaltic rocks, description of, in the Catacecaumene, 



29. 

 Basilosaurus, R. Harlan, M.D., on the discovery of 



the remains of the, or Zeuglodon, 67. 

 - reasons for considering the 



remains to have belonged to a Saurian, 67. 

 . notice of the circumstances which led 



to their discovery, 75 note. 



Basin of the Clyde, reference to proofs of very 

 recent changes in the relative level of land and sea 

 in the, 153. 



of the cli- 

 mate having once been of a more arctic charac- 

 ter, 153. 



. three distinct epochs of super- 



ficial deposits in the, 153. 

 — amount of change of level du- 



ring the post-tertiary epoch in the, 154. 

 no change of level during the 



existing epoch, 154. 

 — catalogue raisonne of shells 



found in the tertiary beds of the, and not known 



to exist in British seas, 155. 

 Basins, description of upright and inclined, 268. 

 Batrachia, remarks on affinities to, in the Labyrin- 



thodon, 504, 519 et seq. 



Batrachiosaurus, remarks by Dr. Harlan on a frag- 

 ment of a head found in the Missouri territory, 

 and called by him, 68. 



Bayfield, Capt., remarks on some fossil and recent 

 shells collected by, in Canada, 135. 



account by, of the strata in which 



they were found, 135. 



remarks of, respecting transported 



organic remains, 138. 

 Beagle Channel, account of glaciers in, 428. 

 Berry Pomeroy, notice of the arenaceous strata near, 



468. 

 Beauport near Quebec, notice of strata near, 135. 

 remarks on the age of the 



beds, 135, 140. 



shells from, 136. 



catalogue raisonne of fossil 



the shells ap- 

 proach more nearly the arctic fauna than that of 

 the St. Lawrence, 141. 



Belgium, Prof. Sedgwick and Mr. Murchison on the 

 distribution and classification of the Palaeozoic 

 deposits of the north of Germany and, (see Ger- 

 many,) 221. 



account of the carboniferous rocks of, 267. 



— • successive groups be- 

 tween the Liege coal-field and the Ardennes, 269, 

 271. 



Bellerophon, observations on the distribution of, in 

 Palaeozoic rocks, 325. 



remarks on species of, from the Devo- 

 nian beds of the Rhenish provinces, 353. 



Bensberg, calcareous rocks of, described, 241, 243. 



■ notice of reversed posi- 

 tion in strata belonging to the, 242. 



Bickington trap, notice of the, 472. 



effects produced by, 480. 



Bilstein, section of the eruptive porphyry at, 264. 



Bird, description of remains of a, from the London 

 clay, 206. 



chalk, 411. 



Birmingham and Gloucester railway, description of 

 a series of coloured sections on the, 545. 



Bishopstone, section of the strata in the cliffs of, 214. 



Blackdown, notice of the bed of angular flint and 

 blocks of chert, &c., on, 448. 



Black schists of Wissenbach, account of, 245, 253. 



