Avicula simplex, 247.
— substriata, 247.
— umbonalis, 246.
Avon, section across the valley of a tributary of the, 203.
—, superficial deposits of the valley of the, 202.
— typical section across the valley of the, near Cropthorne, 204.
Avon and Severn valleys and adjoining districts, Mr. T. G. B. Lloyd on the superficial deposits of portions of the, 202.
Balanophyllia, distribution of, in depth, 55.
Balanophyllia armata, 302.
— australiensis, 303.
— campanulata, 302.
— cylindrica, 304.
— fragilis, 303.
— Selwyni, 303.
— seminuda, 302.
— tubuliformis, 304.
— Ulrichi, 304.
Balanus, 243.
Ballintoy, Middle Lias blocks from, 324.
Ballypalidy, nature and origin of the ferruginous series at, 159 ; section at, 160; section in railway-cutting at, 161.
Baphetes minor, 166.
Basalt, lithomarge, and bole, table of analyses of, 156.
Basalts of the north-east of Ireland, Messrs. B. Tate and J. S. Holden on the Iron-ores associated with the, 151.
Bathygnathus, 39, 49.
Beckford, section through, 204.
Belemnites australis, 258.
Belemnoziphius, 512.
Belodon Plieningeri, 39, 40.
Belumford, section at, 153.
Billings, B., notes on some specimens of Lower Silurian Trilobites, 479.
Birds, Prof. T. H. Huxley on further evidence of the affinity between Dinosaurian Reptiles and, 12.
Black Hill, Snitterfield, section at, 208.
Bleasdell, Rev. W., observations on modern Glacial action in Canada, 669.
Blisworth, Oolites of, 377 ; section from Kingsthorpe through Northampton and Huntsbury Hill to, 359.
Bole, basalt, and lithomarge, table of analyses of, 156.
Bone-bed of Suffolk, 493 ; Terrestrial Mammalia from the, 509 ; Marine Mammalia from the, 511.
Bonney, Rev. T. G., on the geology of the Lofoten Islands, 623.
Borrowdale, lower portion of the green-slates and porphyries in, 600, 601 ; section from Derwentwater to, 601.
Boulder-clay, notes on ancient, in Natal, by Dr. Sutherland, 514.
Boulder-clay, Mr. S. V. Wood, junr., on the relation of the, without chalk, of the north of England to the great chalky Boulder-clay of the south, 90.
Boulder-clays, 694.
Box-stones of Suffolk, 499.
Brachiopoda, Mesozoic, from Queensland, 236.
Brachiopoda, Mr. T. Davidson on the, hitherto obtained from the "Pebble-bed" of Budleigh-Saltteton, near Exmouth, in Devonshire, 70.
Brandon Hill, section from Bristol across, to the Reptilian Quarry on Durdham Down, 188.
Bredon Hill, section from, to Cracombe Hill, 204.
Brick-clays, 694.
Bridlington, fossils of the Glacial deposit at, 92.
Bristol area, Mr. R. Etheridge on the geological position and geographical distribution of the Reptilian or dolomitic conglomerate of the, 174.
Bristol, sections from, to the Reptilian Quarry on Durdham Down, 188.
Britain, Dinosauria from the Trias of, 42.
Britain, glaciation in, 693.
Brown, Dr. R., on the physics of Arctic ice, as explanatory of the glacial remains in Scotland, 671.
Brunswick, Necomian of, 343.
Budleigh-Salterton, Mr. T. Davidson on the Brachiopoda hitherto obtained from the "Pebble-bed" of, 70.
Bunzel, E., notice of a fragment of a Reptilian skull from the Upper Cretaceous of Grunbach, 394.
Busk, G, on the species of Rhinoceros whose remains were found in a fissure-cavern at Oreston in 1816, 457
Cainozoic and Mesozoic periods, the physical geography of Western Europe during the, elucidated by their coral faunas, by Prof. P. M. Duncan, 51.
Calamites, Sigillaria, and Calamoden-
