281 



Orb 



S.E. attenuation, xvi. 71 ; correl. of sub- 

 divs. in Middle & S. England, xix. SOS- 

 SIT ; enumer. of fauna & of spp. common 

 to other formats., xx. pp. li et seqq. & 

 tables iii.-iv. 



Oolite (Inferior) at Camerton, xxiii. 471, 

 474 ; at Marston Boad, xxiii. 4S2 ; im- 

 conform. on Carb. Limest. in Vallis, 

 xxiii. 488 ; of Xorthants, gen. sections, 

 xxvi. 380, xxix. 227; list of foss., xxvi. 

 385 ; Stellaster fr. same, xxvi. 391 ; 

 limest. at Glendon, xxvi. 381 ; at Stot- 

 field, xxix. 163, 164 w. list of foss. ; in 

 Skye, lists of foss., xxix. 345, 346. 



Oolite (Inferior) at Ham Hill, xxxiii. 6 ; 

 in W. Highlands, xxxiv. 719, xxxviii. 

 Proc. 77 ; so-called Midford Sands, 

 xxxv. 736-743 figs. ; struct, of Inf. Ool., 

 xxxv. Proc. 83 ; of Dorset & Somerset, 

 terminat. of ammon. fr., xxxvii. 57-66 

 figs. ; descr. catal. of ammon. spp. fr. 

 same, xxxvii. 588-608 ; Jfegalosatirus- 

 remains fr. same, xxxix. 334; mollusca, 

 etc. fr. same, xxxix. 487-540 & pis. xv.- 

 xix.; porifera fr. same, xxxix. 541-554 

 & pis. xx.-xxi. ; of Cheltenham & 

 Gloucester, madrep. fr., xxxviii. 409-450 

 & pi. xviii. ; in Britain, distrib. of fauna, 

 xxxviii. Proc. 176 ; numer. anal, of 

 same, xxxviii. Proc. 188 ; comp. of same 

 w. that of Gr. Oolite in W. England, 

 xxxviii. Proc. 102 ; I. O. in Cotteswolds 

 & X. Oxon, xxxix. 224-245; spp. of 

 Trigonia in same, xli. 37. 



Oolite (Inferior), stratigr. table, xli. 38 ; 

 sketch-section of Inf. Ool. & Lias in 

 W. England, xlv. 468 ; polyzoa fr. Ship- 

 ton Gorge, xlv. 561-574 & pis. xvii.-xix., 

 1. 72-78 & pis. ii.-iv. 



Oolite Marl, vi. 240, xiv. 108 ; foss. of, xvi. 

 13; in Cotteswold Hills, insol. residues 

 fr., xlvii. 562, 567; chem. anal, of, xlvii. 

 567. 



' Oolithe corallienne ' in Bernese Jura, xliii. 

 235 w. lists of foss. ; correl. w. Coral 

 Eag, xliii. 259. 



Oolithes bathonicce, xvi. 108, 110 figs.; 

 xxvii. 447 & pi. xix. ; xxxviii. Proc. 

 198. 



obtusatus, sp. nov., xxvii. 447 & pi. 



xix. 



sphcericus, sp. nov., xxvii. 447 & pi. 



xix. 



Oolitic iron ore nr. Atherfield, iii. 302; 

 do. of Hambleton Hills, xiv. 92; do. 

 (Xeocom.) of Lines, xxvi. 329; ool. 

 Tert. rocks in Dobrudscha, xiv. 207 

 et seqq. ; sub-recent (?), nr. YVadi 

 Amara, xxv. 21; spherules in Wenlock 

 Limest. of Ehymney district, xxxv. 501 

 & pi. xxiv. ; ool. grains, struct. & orig. 

 of,vi. 426, xxxv. Proc. 74, 75 figs. ; rocks, 

 occurr. of G-irvanella in, xlvi. 270-283 & 

 pi. xi. See also Pea-Grit, Pisolite, §• 

 Pisolitic. 



Opacite in Cumbrian mica-traps, xxxv. 

 167. 



Opal, 'semi-opal' in Victorian basalt, xiv. 



234; op. of recent format., xxxiv. 75 & 

 pi. iv. ; in Cir Mhor pitchstone, xlix. 

 549; in Tormore do., xlix. 560. 



Opesia in cheilostomata, xxxix. 424. 



Ophicalcite in Anglesey, etc., xxxvii. 42. 



Onhidia, relat. of Mosasauridae to, xxxiii. 

 "682-715 figs.; xxxiv. Proc. 57, 58. 



Ojphileta compacta, xv. 378 & pi. xiii. 



sp. (Upper Arenig), xxxi. 188 & 



pi. xi. 



Ophir Mine (Xevada) , xx. 324. 



Ophite nr. Bastenne, ii. 81 ; (eozoonal) of 



Grenville, xxii. 187 et seqq. ; of Conne- 



mara, xxii. 190 et seqq., 210, 214; of 



Skye, xxii. 204, 214. 

 Ophitic structure def., xli. 360; do. ex- 

 plained, xli. Proc. 86, xlii. 76 ; do. in 



Tert. gabbros, etc., xlii. 68 & pi. v. ; oph. 



dolerite of Shiant Is., xli. 394. 

 Oplitlialmosav.rus, gen. nov., pectoral arch 



& fore-limb of, xxx. 696-707 & pis. xlv.- 



xlvi. 

 icenicus, sp. nov., xxx. 699 & pis. 



xlv.-xlvi. 

 Opis carinatus, sp. nov., xii. 324. 

 spathulosus, sp. nov., xxxix. 529 & 



pi. xviii. 

 triangularis, sp. nov., xxiii. 541 & 



pi. xvii. 

 Oporto (Portugal), geol. of neighb. of, v. 



142-150 w. map ; *coal-pits of San 



Pedro da Cova nr., xix. (Part 2) 9-15. 

 Oppei, A., *Jurass. Cephalop. fr. Wiirt- 



temberg, xii. (Part 2) 22. 

 (& E. Suss) * Equivs. of ' Kos- 



sen Strata ' in Suabia, xiii. (Part 2) 



1-7. 



(& F. Eoxle), *Fauna of 



Equiv. of TEhaetic] Bone Bed, xiv. (Part 

 2) 24-25. ~ 



, obituary of, xxiii. p. xlviii. 



Oppelia, range & distrib. of, xxxviii. 

 Proc. 233. 



subcostata, xxxvii. 607. 



subradiata, xxxvii. 606. 



Truellii, xxxvii. 606. 



Oppelismilia, ref. to Ilontlivaltia, xxxviii. 

 417. 



Oppenheim (Hesse-Darmstadt), section to 

 Mainz, x. 270. 



Optical anomalies in crystals , xliii. Proc. 65. 



Orange Free State (S. Africa), diamond- 

 fields of, xxviii. 23. See Kroonstad, 

 Winburg, cf- other 'place-names. 



Orange Grove (Transvaal), section to 

 Metropolitan, xlviii. 421. 



Orange Biver (S. Africa), section to coast 

 at Alexandria (Xatal), xxvii. 537; O. E. 

 & Vaal E. junct., country bettv. Gr. Salt 

 Pan and, xxx. 594 & pi. xxxix (section) ; 

 country betw. Campbell Eandt and, 

 xxx. 602 & pis. xxxviii .-xxxix (map 

 & section) ; country betw. 'Kheis & 

 Central Langeberg, xxx. 646. 



Orbicula (?) crassa, vii. 151 fig., 175 & 

 pi. x. 



sp. (PSilur.), ii. 277 & pi. x.; sp. 



placed under Trematis, iv. 67-69. 



