part 4] 



aEl^EEAL INDEX. 



347 



Concretionary Beds of Avon section, 



230-31, 232, 242. 

 Cordaitales in E. Glamorgan Coal- 



Measures, 60, 61. 

 Comiispira, minute structure of shell, 



206-207. 

 Corwen (Merioneth) & Glyn Ceiriog, 



Valentian Series of, 164-66. 

 CossMANN, A. E. M., 341 ; [elected 



For. Corresp.], vi. 

 Council, annual report of, vii-xx ; 



(& Officers), election of, xxx. 

 Cox, A. H., 31. 

 Cretaceous limestones, &c., of Moro- 



cocha Valley, 261 & pis. xviii-xix. 

 Grossotheca in E. Glamorgan Coal- 



Measures, 60. 

 Cyclical homoeomorphy in gastropods, 



307-308. 

 Cyclopteris in E. Glamorgan Coal- 



Measures, 60. 



Dacite of Morococha Valley, 261-62 



& pis. xviii-xix. 

 Dailly Stage = Upper Valentian, 154, 



157-58. 

 Daniel-Pidgeon Fund, list of re- 

 cipients, xxxvii. 

 Darfur (Africa), rock-specimens from, 



iii. 

 David, Sir Tannatt W. E., 142. 

 Davies, D., on the Ecology of the 

 Westphalian & the Lower Part of 

 the Staff or dian Series of Clydach 

 Vale & Gilfach Goch (East Gla- 

 morgan), 30-72 figs. & pi. ii, 74. 

 Davies, H. N., obituary of, Ixxv. 

 Davv^kins, W. B., [obituary of W. 



Watts], Ixxii-lxxiii. 

 Desiccation-brecciation exhibited in 



Avon section, 236-37. 

 Dibunophijllum Beds of Avon sec- 

 tion, 233-36, 242. 

 Dinas Main Colliery, see Gilfach 



Goch. 

 Diopside-rocks in S. Eyre Peninsula, 



81. 

 Diorites in Peru, 257 et seqq. 

 Diploceras cornutum, 270. 

 Dixon, E. E. L., 238. 

 Dolomitization in Avon section, 237, 



238. 

 Donors to Library, lists of, xxii-xxvi. 

 DoBLODOT, H. DE, [elected For. 



Corresp.], vi. 

 Douglas, J. A., on Geological Sec- 

 tions through the Andes of Peru & 

 Bolivia : III. — From the Port of 

 Callao to the River Perene, 246- 

 83 figs. & pis. xv-xx, 284. 



DouviLLE,H., [elected For.Corresp.], 



vi. 

 Draha incana at Barnwell, 17. 

 Dreikanter fr. Barnwood, iv ; fr. 



Tumbes Desert, v. 

 Drumyork Group, see Dailly Stage. 

 DUNSTAN, B., 294, 

 DuPARC, L., [elected For. Corresp.], 



vi. 

 Dutton Series (Pre-Cambrian), 78. 



Earthquakes, seasonal variation in 

 frequency of, 1-3. 



Echioceras cf. raricostatum, 264. 



Ecology of Westphalian & Lr. Staf- 

 fordian of Clydach Vale & Gilfach 

 Goch, 30-74 figs. & pi. ii. 



Election of Auditors, v ; of Council 

 & Officers, xxx ; of Fellows, ii, iii, 

 iv, V, vi, xciii, xciv, xcv, ci ; of 

 Foreign Members & Correspon- 

 dents, v-vi. 



Elles, (Miss) G. L., 16. 



Elsden, J. v., [retires fr. Treasurer- 

 ship], xxix. 



Embryonic whorl, use of term, 301. 



Eiiallaster texanus, 272. 



Equisetales in E. Glamorgan Coal- 

 Measures, 61. 



Eremopteris ('0 i^ E. Glamorgan Coal- 

 Measures, 60. 



Estimates for 1921, xxxviii-xxxix. 



Exelissa, notes on generic name, 317- 

 18 ; see also Procerithiu'in. 



Exogyra cf. conica, 272. 



Eyre Peninsula, see Southern Eyre. 



Faults, nomenclature of, Ixxvii et seqq. 



Fellows elected, ii, iii, iv, v, vi, xciii, 

 xciv, xcv, ci ; names read out, ci ; 

 number of, xxvii-xxix. 



Fermob, L. L. , Bigsby Medal awarded 

 to, li-lii. 



Finances of the Society, memorandum 

 on, x-xvi. 



Financial report, xl-xlv. 



' Fish-Beds ' in Avon section, 222, 

 240. 



Five-Foot Seam (Gilfach Goch), plant- 

 remains in, 33-35 fig. 



Fletcher, Sir Lazarus, obituary of, 

 Ixvi-lxvii. 



Flinders Series (pre- Cambrian), 77 ; 

 geographical extent & constitu- 

 tion of, 78-81 ; comparison w. 

 other pre-Cambrian areas, 127-30. 



Flints, compound, fr. Teynham, v. 



Foraminiferal shell, minute structure 

 of, 194-212 figs. & pi. vii. 



