201 



Isc 



in Venezuela, xxxv. 584; brown, occurr. 

 of recent plants in, xxxvii. 1-5. 



Iron ores of Rio Tinto district, xli. 253 

 w. chem. anal. ; concretions of, in Bag- 

 shot Beds, xliii. 378 ; in plutonic rocks 

 of Garabal district, xlviii. 108 ; in Matto 

 Grosso, 1. 98 et seqq. ; nr. Wadi Haifa, 

 1.534. 



Iron oxides, in conn. w. foliation, xi. 175 ; 

 in Maryland & Tennessee, xiii. 245 

 et seqq. ; opaque, in Gr. Whin Sill, w. 

 chem. anal., xl. 650 & pi. xxix.; elim. 

 fr. crystal! schists, xlix. 421. 



Iron peroxide colourg. rocks, v. 26 ; de- 

 oxidized & discoloured, x. 10. 



Iron pyrites at Cobre (Cuba), xii. 150. 



' Iron rock ' in Malay Peninsula, vii. 314 

 et seqq. w. chem. anal. 



' Iron Sands ' of Shotover Hill, xiv. 238, 

 240. 



Iron Sandstone (Diestien), viii. 294, 324 ; 

 rhomboidal, xxi. 421 ; (Clinton Group), 

 traces of fish-remains in, & chem. anal, 

 of coprolites, xli. 58. 



' Ironshot Oolite,' xlix. 498 et seqq. ; of 

 Dundry Hill, list of foss. fr., xvi. 23. 



Ironstone in Coal Measures, format, of, iii. 

 p. lxxxix ; in W. Australia, v. 52 ; 

 Liassic, at Mickleton, ix. 31, 33. 



Ironstone, fossilif., on N. Downs, xiii. 212, 

 xiv. 322-335; Liassic, of Cleveland, xiv. 

 86, 96; Oolitic, of Hambleton Hills, 

 xiv. 92 ; in Coai Measures at Shireoak, 

 w. chem. anal., xvi. 140; in Coalbrouk- 

 dale, xvii. 458. 



Ironstone, Neocom., in Lines, xxiii. 245, 

 xxvi. 329 ; Wealden, in Lr. Boulonnais, 

 xxiv. 476 et seqq., 480 ; post-Tertiary, of 

 Cape York Peninsula, xxv. 300; at Hus- 

 ton Quarr} r , xxvi. 373 ; at Blisvvorth 

 Pit, xxvi. 378 ; orig. of clay ironst., xxix. 

 363-369. 



Ironstone, in L. Lias of N.W. Lines, xxxi. 

 118, 119; Neocom., ibid., xxxviii. 239 

 et seqq. ; implem. of, in Robin Hood 

 Cave, xxxii. 250, 251, figs., xxxiii. 593 

 fig. ; ironst. in Corallian of Abbotsbury, 

 xxxiii. 273, 275 w. chem. anal. ; of Hen- 

 gistbury Head, xxxv. 2 14 ; of H3 r tanahan, 

 etc. in Brazil, xxxv. 771, 772 ; pisolitic, 

 of Cader Idris, xiv. 426, 427. 



Iroustone (Lr.) in Northants Sands ?, 

 enumer. of foss., xxxviii. Proc. 95. 



'Irony Bed' (Inf. Oolite), xlix. 485 et 

 seqq. 



Irving, A., [Rhsetic & Boulder Clay nr. 

 Nottingham^, xxxi. p. lxxxi. 



, Recent Sections nr. Notting- 

 ham, xxxii. 513-515. 



, Mechanics of Glaciers, w. esp. 



Ref. to their supp. Power of Excav., 

 xxxix. 62-71 ; Orig. of Valley-lakes, w. 

 esp. ref. to Lakes of N. Alps, xxxix. 

 73-81 w. section. 



, Dyas (Perm.) & Trias of 



Central Europe. & true Divisional Line 

 of these two Systems, xl. 389-402 w. 

 section*. 



Ieving, A., Gen. Section of Bagshot Strata 

 fr. Aldershot to Wokingham, xli. 492- 

 509 figs. 



, Phvs. History of Bagshot 



Beds of Lond. Basin, xliii. 374-389 w. 

 sections, xliv. 164^184 w. section ; [abs.], 

 xlvii. Proc. 2. 



, Red Rock Series of Devon 



Coast-section, xliv. 149-163, xlviii. 68- 



77. 

 , Plateau-gravels of E. Berks & 



W. Surrey : their Age, Comp., & Struct., 



xlvi. 557-563. 

 , Recent Excav. in Wellington 



College District [abs.], xlvii. Proc. 171. 

 , Bagshot Beds of Bagshot Heath 



(a Rejoinder), xlviii. 485-486. 

 , Base of Keuper Format, in 



Devon, xlix. 79-83. 

 Irwin River (W. Australia), section of 



coal-seams on, xvii. 481. 

 Is-Shantiin fissure (Malta), PJlephas- 



remains in, xxvi. 434-436. 

 Isabella copper-lode (Tennessee), xiii. 251. 

 Isallt (N. Wales), section to Ffemant 



Dingle, xxxv. 269. 

 Isandlhwana (Natal), basalt, etc. of, xxxvi. 



427. 

 Isastrcea arachnoidea, sp. nov., xix. 3 & 



pi. ii. 



Beesleyi, xxxix. 185. 



conferta, sp. nov., xix. 422 & pi. xiv. 



confusa, sp. nov., xxiv. 14 & pi. ii. 



Conybearii, xiii. 136. 



depressa, xxxviii. 426. 



explanata, xl. 718. 



explanulata, xxxix. 186; xl. 713. 



gibbosa, xxxix. 185. 



globosa, xl. 373. 



GHimbelii, xl. 373. 



helianthoides, xl. 718. 



latimceandroidea, occurr. of, xxxiv. 



184. 



limitata, xxxix. 185 ; xl. 712. 



microphylla , xxxix. 185. 



Murchisoni, sp. nov., xiv. 34. 



oblonga, xxxviii. Proc. 223; xxxix. 



563 & pi. xxii. ; xiii. 134. 



portlandica, xl. 719. 



Bichardsoni, var. antipodum, nov., 



xxiii. 162. 



serialis, xxxviii. 425. 



sinemuriensis, xl. 373. 



Stricklandi, zone of, xxxiv. 185. 



tenuistriata, xxxviii. 425 ; xiii. 126. 



Tomesi, xxxiv. 184, 185. 



tuberosa, sp. nov., xl. 713. 



turbinata, sp. nov., xix. 423 & pi. xiv. 



Isauld Burn (Sutherland), section in 



O. R. S., xv. 403. 

 Isbistee, A. K., Geol. of Hudson's Bay 



Territories & of portions of Arctic & 



N.W. Regions of America, xi. 497-520 



& pi. xiv (map). 

 Ischadites, outer form & struct, of, xl. 810 



& pi. xxxvi. 



(?) inosculans, xl. 840. 



Koznigii, xl. 836 & pi. xxxvi. 



