Vol. 56.] 



GENEEAL INDEX. 



773 



Oonagappul (Waterford), diabase, etc. 



of, 672, 675. 

 Opal-silica developg. double refraction 



506. 

 Ophicalcite in N. Anglesey, 250. 

 Orangite as a source of thoria, 525- 



26. 

 Orbicella mammillosa, 32. 

 Orchy, Glen (Argyll), kentallenite of, 



533, 534. 

 Ordovician (& Silur.) complex of 



Central Wales, 68-71; Ordov. of 



N. Anglesey, 233, 234-38 & figs. 

 Ornithorhynchus closely relat. to Ano- 



modontia, 642-44 w. figs. 

 Orogenic model of earth, F. Sacco's, 



xev. 

 Orthoclase, it3 peculiar assoc. w. oli- 

 vine & augite in kentallenites, 538 ; 



see also Microperthite. 

 Osborn, H. F., elected F. C, iv. 

 Osebury Bock (Hereford), Haffield 



Breccia, etc. near, 185-186 w. map 



& sect. 

 Osterby (Dalecarlia), locality for rare 



earths, 523. 

 Overfolding in IS. Anglesey, 237. 

 Overlap in Silur. sequence of Bhay- 



ader, 114, 123. 

 Overthrusting in N-. Anglesey, comp. 



w. that in Scotland, 256. 

 Oxford University Museum, fossils in, 



264-86 w. figs. & pis. xvi-xix, 616- 



19 w. fig. & pis. xxxiv-xxxv. 



Palaeolithic implements fr. West 



Wickham, 8-9, 10. 

 Palceoneilo, generic diagnosis, etc. of, 



46-47. 

 carbonifera, sp. nov., 47-49 & 



figs. 

 Palaeontology, progress in, lxiv. 

 Palasozoic rocks, their^ extent & 



thickness in London Basin, etc., 



lxxxiii-lxxxv ; see also Cambrian, 



Devonian, etc. 

 Pantellerites disting. fr. kenytes, 209, 



213-14. 

 Pareiasaurus, compar. w. Aristodesmus, 



621 et seqq. 

 Park, J., quoted, 493. 

 Parkinson, F. B., quoted, 28, 38, etc. 

 Parkinson, J., on Bocks of S.E. 



Coast of Jersey, 307-19 w. figs. ; 



on Bocks of La Saline (N. Jersey), 



320-24. 

 Pasu (Gilgit), sect, to Sherkila, 350. 

 Pebble-beds (Bunted of Midlands 



& source of their materials, 287- 



306 w. map & pi. xx (microsc. 



sects.). 



Pegmatite-veins as a source of rare 



earths, 523, 524, 530; p.-v. in 



Ceylon, 602. 

 Pen-y-rhiw (Bhayader), Silur. se- 

 quence of, 108 ; sect, to Fron- 



dorddu Farm, 106. 

 Penarth (Pen-y-glog) Quarry, Upper 



Silur. of, 398-99. 

 Pennine Bange, not a source of Mid- 

 land pebble-beds, 299. 

 Penny Hill (Abberley Hills), geoL 



struct, of, 165 et seqq. ; sects, to 



Bodge Hill, 169. 

 Penrhyn (Anglesey), dykes near, 250, 



251. 

 Pe%tamerus-gvit of Builth district, 



374. 

 Penterfyn Ironstone (N. Anglesey), 



236, 237. 

 Penwaun Pool (Builth), sect, to Tre- 



maen thro' Aberedw Hill, 437. 

 Perlicity, scalariform, in Waitekauri 



obsidian, 496 & pi. xxvii. 

 Perlitic rhyolite fr. Waihi Beach, 



500-501 ; felsites of Waterford 



coast, 681. 

 Permo-Carboniferous, of IS". S. W., 



evid. of glaciat. in, viii ; P.C. (?) 



age of earth-movemts. in I. of 



Man, 22, 23; P.C. of Frederick 



Henry Bay, diabase intrusive into y 



333-36 & pi. xxii. 

 Persian Gulf, ' miliolitic ' deposits in 



islands of, 567-69 w. map. 

 Petrology, progress in, lxiii. 

 Petrostroma contrasted w. Plectro- 



ninia, 50, 52-53, 57 ; contrasted w. 



Bactronella, 60, 61. 

 Pkacops (Dalmania) coronatus, sp. 



nov., 616-17 & pi. xxxv. 

 ■ ( ) nobilis, sp. nov., 617-18 



w. fig. & pi. xxxiv. 

 Phonolites of Mt. Kenya, 210, 215 & 



pis. xi-xii, 

 Phylogenetic classificat. of foss., 413. 

 Pidurutalagalla, see Newera Eliya. 

 Pisocrinidee, new diagnosis of, 270. 

 Pisocrinus disting. fr. Cicerocrinus, 



267-69 w. fig., 270-71. 

 Plagioclase, corrosion of, 309-10 & 



fig. 

 Platycrinus disting. fr, Brahmacrinus, 



266, 271-72. 

 Plectroninia Halli, gen. et sp. nov., 



51-56 & pis. iii-iv; its relat. to 



other calcisponges, 57-58 ; generic 



diagnosis of, 58-59, 

 Pleistocene of Somaliland, 43; of 



Brit. E. Africa, 225, 228. 

 Pliocene of E. England, proposed 



classificat. of, 708 ; see also Crag. 



