279 



Ong 



Olenellus, restriction of genus, xlviii. 

 236. 



■ asaphoides, 1. 415, 416, 423 figs. 



gigas, sp. nov., 1. 666 fig. & pi. xxxii. 



Gilherti, 1. 671 & pi. xxxii. 



intermedins, sp. nov., 1. 666 & pi. 



xxxii. 



Lapworthi, sp. nov., xlviii. 236 & 



pi. v., 1. 662 & pis. xxix., xxx., xxxii. ; 

 var. elongatus nov., 1. 664 & pi. xxix. 



reticulatus, sp. nov., 1. 665, 673 fig. 



& pis. xxx.-xxxi. 



sp., xlviii. 239 & pi. v. 



01 'enellus -zone in Canada, etc., xlv. Proc. 

 80; in N.W. Highlands, xlviii. 227-242 

 figs. & pi. v (foss.1 ; addit. to fauna 

 of same, 1. 661-676 & pis. xxix.-xxxii. 

 Olenus, distrib. of genus in time, xxvii. 

 395. 



(SpJicerophthalmus) pecten, xxi. 481 



figs., 482. 



■ Salteri, xxxiii. 666 & pi. xxiv. 



— ■ — triartlirus, sp. nov., xxxiii. 666 & 



pi. xxiv. 

 Olemis-shaies at Malvern in relat. to 



Shineton Shales, xxxiii. 661. 

 Oligocene of I. of W. [fluvioniarine Tert.], 

 ix. 259-270 ; Chipea vectensis fr. same, 

 xlv. 112-117 & pi. iv. ; of Hants Basin, 

 xxxvi. 137-177 & pi. vii (sections) ; relat. 

 w. Eoc. ibid., xxxviii. 461^89 figs. ; 

 *Beyrich's prop, of name, xii. p. lxxxii ; 

 *demarc. of period, xx. (Part 2) 5-12 ; 

 correl. tables, *xx. (Part 2) 12, xxxvi. 

 167 ; Olig. of Belgium, N. Germanv, & 

 S. England correl., xx. 97-102 ; *(Lr.), 

 fauna nr. Helmstadt, xxii. (Part 2) 17- 

 19 ; *(Lr. & Upp.) of Germany, xxii. 

 (Part 2) 19-23 ; *Reuss's work on same, 

 xxii. p. lxx ; Olig. coral-fauna, *xxi. 

 (Part 2) 8, xxvi. 66 ; Olig. of New 

 Zealand, xxix. 375. See also Headon 

 Hill, Hempstead, <§• Hordwell. 

 Oligoclase in Donegal granite, chem. anal, 

 of, xviii. 412 ; of Ytterby, chem. anal of, 

 xviii. 412, xx. 279 ; fr. Twedestrand, 

 cross-hatched felsp. -patches in, xxxi. 480, 

 481 & pi. xxiii. See also Felspars. 

 Oligoclase-porphyry of Quenast, vii. 6 ; of 



Lessines, vii. 8. 

 Oligoporus, gen. char, of, xxx. 314 & 



pi. xxiv. 

 Oligosaurus adelus, gen. & sp. nov., 



xxxvii. 678-681. 

 Oliphants River (Cape Colony), conglom. 



of, xliv. 264 w. section. 

 Oliva cylindrica, sp. nov., vi. 45. 



utricuhis, xx. 54 & pi. vii. 



sp. (Eoc), i. 431 fig. 



Olive Group of E. Salt Range, fossilif. 



pebble-band in, xlii. 341-350. 

 Olive Shales in Griqualand West, xxx. 



586 et seqa. 

 Olivine in Brit. Carb. dolerites, xxx. 539 & 

 pi. xxxiv., 1. 611 ; pseudomorphs after, 

 in same, 1. 613, 614 ; do. in Warwick 

 diorite, xxxv. 640; oliv. in sediment. 

 rocks, xxxvi. Proc. 53; (?) in Yellow- 



stone obsidian, xxxvii. 394 ; in diabase 



of St. David's & pseudomorphs after 



it, xxxix. 304 & pi. ix. ; in gabbros 



& peridotites of Western Is., xli. 373 ; 



changes prod, in same at great depths, 



xli. 381, 397 ; oliv. in pluton. rocks of 



Garabal district, xlviii. 108 ; serpentiniz. 



of, xliv. 455 ; corroded & twinned crystals, 



in Madagascar basalts, xlv. 347 figs. ; 



phenocrysts, xlviii. 503; perlitic cracks 



in cryst., 1. 374, 375. 

 Olivine-basalts at St. Mary's (Azores), ii. 



39; ofMadagascar,xlv.346,349; altered, 



of Devon, xlviii. 502; Carb., of Garlton 



Hills, w. chem. anal., xlviii. Proc. Ill ; 



do. in Central Scotland, xlviii. Proc. 



129. 

 Olivine-dolerite series in S. of I. of Man, 



xlvii. 434, 445 ; oliv.-dol. of Jebel Burka, 



1. 533 ; of Derbyshire, 1. 624. 

 Olivine-gabbro, term discarded, xlii. 62; 



oliv. gabbro-diabases of Gran district, 



1. 18; cbem. anal, of same, 1. 19, 20; 



contact-metamorphism by, 1. 21. 

 Olivine-norite of Madagascar, xlv. 342. 

 Olivine Range (N.Z.), peridotite of, xlvi. 



627 & pi. xxiv. 

 Olmiitz (Moravia), *Neogene plastic clay 



of, xix. (Part 2) 15. 

 Olti (Erzerum), coal nr., vi. 367, vii. 65. 

 Olympic Range (Washington), xvii. 445. 

 Olympus, Mt., section to Aliveri, iii. 67. 

 Omaider (N.W. Arabia), rocks betw. 



Madian and, xxxi. 8 ; do. betw. Akabah 



and, xxxi. 10. 

 Omalius d'Halloy, J. B. d', obituary of, 



xxxi. p. xlv. 

 Ombos (Egypt), alluvium, etc. at, xx. 



16. 

 Omeo (N. Gippsland), argillac. & cryst. 



schists nr., xxxv. 15 figs. 

 Omosaurus durobrivensis, sp. nov., xliii. 



699 fig. 

 Omphacite in quartz-diorite of Upata, 



xxxv. 589. 

 ' Omphalos,' *Gosse's work, xiv. pp. clix 



et seqg. 

 Omsk (Siberia), section at, xxx. 492. 

 Onchus, trilob. mistaken for, vii. 264; 



Pterygotus mistaken for, ix. 12-14, 



16. 



Clintoni, sp. nov., xli. 61 fig. 



MurcHsoni, ix. 12, 16 ; (?), xiii. 288 



& pi. x. 



pennsylvanicus, sp. nov., xli. 61 fig. 



tenuistriatus, ix. 14. 



Oncoceras (?), xv. 377 & pi. xiii. 

 Onega, Lake (Russia), section, ii. 379. 

 Oneida Conglomerate (Silur.) in N.Y. 



State, xiv. 350, 395, 432. 

 Onekakara (N.Z.), septaria & cone-in-cone 



clay fr., vi. 324. 

 Ongeluk (Griqualand West), rocks descr., 



xxx. 628, 629. 

 Onglet, H. S., Earthquake in Crete 



[abs.], xiii. 240. 

 Ongsteens Vand (Norwaj^), mica-schist w. 

 dichroite, xi. 174 fig. 



