686 



GENERAL INDEX. 



[Dec. 191 2, 



Arthropleiira armata, 684 & pi. Ix. 

 Ashes, fossilif'erous bedded, of El 



Brazil, 118-19 ; do., of Barranca, 



124-25 ; aee aho Tuffs. 

 Ash fell (& Ortoii) Sandstone Series, 



485, 495. 

 Ashy Series (Ordovic.) of Mynydd-y- 



Gader area, 347-48 ; petrology of, 



357, 360-61 & pi. xxxvii. 

 Assets (Geol. Soc), staiemeot of, 



xxxviii. 

 Athymodictya compared w.- Crypto- 



venia, 316-17. 

 Afhyris - glabristria Zone in IST.W. 



Province, 4r!6-66 w. lists of foss., 



486-90, 505-507, 518-19, 522-23, 



532, 537-39. 

 Attvvood, Gi-., obituary of, Ixv-lxvi. 

 Auditors elected, iv. 

 Auofite, conversion of, into horn- 

 blende, 51. 

 Augite-audesite of El Brazil, 117. 

 Augite-diorites, see Diorites. 

 Augite-dolerites of Kilbride Peninsula, 



94-95. 

 Auriferous quartz-veins in the Avan- 



gares district, 126-27. 

 Avangares district (Costa Rica), lavas, 



&c. of, 126 et seqq. ; sect. fr. A. 



Mines to the Gulf of Nicoya, 



128. 

 Ayrnestry Limestone of Pedwardine, 



371. 



Bailey, E. B. (& M. Macgregor), 



the Glen-Orchy Anticline (Argyll), 



164-78 figs. & pi. X (geol. map), 



179. 

 Balance-sheet, xxxiv-xxxv. 

 Balanus limestones in Costa Hica, 



103 & pi. ix (uiicroseop. sect.). 

 Ballachulish Limestone & Slates in 



Glen-Orchy Anticline, 164 et seqq. 

 Ballingdon, see Sudbury. 

 Baltzer, a., elected For. Merab., iii. 

 Banded rhyolites of Mynydd-y-Gader 



area, 360 & pi. xxxviii. 

 • Bauds ' (palseontological) in Lr. 



Carb. of ISr.W, Provir.ce, ^^55. 

 Bardon-Hill Quarries (Leicestershire), 



map of, showg. contours of buried 



hills, pi. XXV. 

 Barloav-Jameson Fund, list of re- 

 cipients, xxxi. 

 Barnarinnia district (Mayo), Silur. 



rocks of, 87-88 

 Barnscar (Cumberland), glacial 



drainage-channel, 425. 

 Baropus lentils contrasted -w. Icknium 



sjyJim-odacti/him , 661-62. 



Barranca (Costa Rica), Miocene (?) 

 sediments of, 123-25. 



Barren Coal Measures, see Haunch- 

 vs^ood Sandstones, ^r. 



Barrow, G., 402; [on southward in- 

 crease of post-Carb. earth-creeps], 

 73 ; [on Palaeozoic below London 

 Basin], cix ; [on Pebidian, &c. in 

 Pembrokeshire], 4U0-401. 



Barston (Warwickshire), Lr. Lias at, 

 265. 



Barytes in tapper Xeuper of Charn- 

 wood area, 290. 



Basement Carboniferous of Roman 

 Fell, &c., 535-36 w. iTiap. 



Bather, F. A., viii ; [on phylogeny 

 of Crelac. Inocerami], 20. 



Beinn-Doirean inversion (Argyll), 

 177 (sects, on p. 176). 



Beinn-Udlaidh Fold (Argyll), 167-72 

 figs. 



Bknson, p. de G., 456. 



Berriman, — , 228. 



Bibliography of Argyll geology, 178 ; 

 of Carb. Limest. at Upper Vobster, 

 72 ; of Costa Rican geology, 105 ; 

 of the Upper Keuper Sandstone of 

 Warwickshire. 276-78 ; of geol. 

 struct, of Central Wales, &c., 329- 

 32; of Pembrokeshire Cambrian & 

 pre-Cambrian, 377 ; of glaciation 

 in Black-Combe district, 403-405 ; 

 of Warwickshire Coalfield, 588-89, 

 636-37 ; of Midland Permian, 640- 

 42. 



BiGSBY medallists, list of, xxx. 



BioN, H. S., 456. 



Biotite, conversion of hornblende 

 into, 51-52. 



Biotite-soda-granite, see Granite. 



'Birdseye,' see Diorites. 



Birkhill Group, equivalents ia Central 

 Wales, 336. 



Birmingham, deep borings at Small 

 He.ith & Moseley Road, 273-76; 

 see aho Ham stead. 



Black-Combe district (Cumberland), 

 glaciation of, 402-48 figs. & pis. 

 xli-xliii. 



Blackmore, H. p., 19. 



Blattoid wings irom Kent Coal Mea- 

 sures, 321-22 & pi. xxxiii. 



Blea-Flatt Limestone, 485. 



'Bolsous' (=old lake-basins), in 

 Costa Rica, 114. 



Boi/rox, H., Insect- Remains from the 

 Midland & South-Eastern Coal 

 Measures, 310-23 & pis. xxxi- 

 xxxiii. 



BoNNEY, T. G., .588 ; [obituary of G. 

 Attwood],. Ixv-lxvi ; [on Glacial 



