INDEX. 



887 



Page. 



Gervillia inontanaensis Meek 617 



Gervillia sp 617 



Gibbon River, rbyolite of 366-367 



Gilbert, G. K., cited 17 



Gill. A. C, acknowledgements to 183 



Girty. G. FI., acknowledgments to 441 



descriptions of Devonian and Carboniferous fos- 

 sils by 479-599 



Glass, character of 403 



giobulitic 406-408 



microlitic 408-410 



rbyolitic 406 



Glyptostrobus ungeri Heer 681 



Gneiss, occurrence of 4, 12, 20 



Goniobasis gracilentalleek 632 



Goniobasis { . ? ) increbescens n. sp 633, 648 



Goniobasis ( ?) pealei n. sp 632-633. 64S 



Grand Canyon of the Yellowstone, rocks of 389-390 



Granite, view of specimen of 100 



Granitic aplite, photomicrographs of 250 



Gravel Peak, features of 188-1 90 



Gray Peak, rocks of 42-43, 73- 82 



section near 46 



Grewiopsisaldersoni n.sp ;.. 743-744 



Grewiopsis platanifolia "Ward 744 



Grewiopsis populifolia "Ward 729 



Grizzly Teak, dikes and rocks of '. 306-307,308,310 



Grypha?a calceola var. nebraseensis Meek and Hay- 

 den 61 3, 642 



Grypluxa dilatata 611 



Gryphrca planoconvexa Whitfield 61 1, 64$ 



Gryphaea vesicularis 011 



Glyptostrubus curopa-us (Brongt.) Heer 681 



Gymnogramma haydenii Lx 657 



Gy rodes depressa Meek 639 



Gyrodes petrosa 639 



H. 



Hague, Arnold, letter of transmittal by xiii i 



cited 220,331 



Haguia, description of 4'2'i 



Haguia sphrcrica, n. sp 442-443, 474 



Haldat du Lys, C.N.A.de, cited 418 



Hall. James 44G 



Hall and Whitfield, cited 487,498,499,526 j 



Hemipronites crenistriata 540 



Herrick, C. L., cited 493 I 



Hicoria antiquorum (Newby) Kn 690 



Hicoriacrescentia,n.sp 690-691,505 I 



Hicoria culveri n.sp 691-692, 806 



Hicoria ovata (Mill.) Britton 692 



Hillebrand, W.F., analyses by 354 



Hindu, G. J., cited 442 



Hornblende-mica-andesites, occurrence of 290-291 



Holasterella wrighti var. americana n. var 50S, 599 



UolniCB, W. H., cited 14,31,221,357,651-652,756 



Bomoroya gallatinensis n. sp 625-6*26, 646 



Hoodoo Basin, features of 223 



view of 



Eoodoo -Mountain, dikes of 224 



dike rocks of 348 



Horn blende aud« -dto, occurrence of 4, 2D1 



HornbIcD.dC'ando8ite-porpbyry, analyses of 8.1 



occurrence of 77-80 



Hornblende-mica an dos He- porphyry, analyses of 01, hi 



character of go 04 



occurrence of 250 258 



Tage. 



Hornblende-pyroxene-andesite, occurrence of 258-259, 



291-294,300-301 

 Hornblende-pyroxene-andesite-porphyry, occurrence 



of 80 



Hoy t Peak, dikes and rocks of 306-307 



Huckleberry Mountain, dacito of 172-173 



descriptive geology of 165-202 



detailed geology of 170-173 



rbyolite of . 172 



Hurricane Mesa, dikes of 225-229 



nature of, volcanic rocks of 340, 346 



view of $26 



Hurricane Ridge, view of 226 



Hustedia triangularis Miller 560 



Hyatt, A., cited 602 



Hyolithes primordialis 454, 466,474 



Hyolithes (Theca) primordialis Hall 454 



Hidings, J, P., cited 17, 89, 261, 292, 333, 360 



Iddings and Pen field, cited 380 



Igneous rocks of Absaroka Range and Two Ocean 



Plateau 269-325 



Ilex undulataLx 658 



Indian Creek, intrusive sheet north of 68 



section at 21 



Indian Creek laccolith, features of 10, 13-16, 60-64 



mode of origin of 9 



Index Peak, view of 218 



Inoceramus acuteplieatus n, sp 634-63-3, 637, 64S, 650 



Inoceramusaltus 635 



Inoceramus flaccid us White 634 



Inoceramus fragilis 635 



Inoceramus umbonatus Meek and Hay den 634 



Inoceramus uudabundus Meek and Hayden 634 



Intrusive flows, Crandall Basin 240-259 



Intrusive rocks, analyses of 426 



Ipbidea Billings 447 



Iphidea bella 448 



Ipbidea coilata 448 



Iphidea labradorica 448 



Ipbidea ornate 11 a 448 



Iphidea pannula "White 448 



Iphidea prospectensis 448 



Iphidea sculptilis Meek 447-448, 449, 468 



Iphidea sp. uudet 449, 46S 



Iris Falls, rbyolite at 376 



Ishawooa Canyon, analysis of rocks from 329 



dike rocks of 349 



Joseph Peak, igneous mass of 73-82 



rocks of 43, 44 



section at 47 



Jurat Has fossils 107 



Judd, J. W., cited 243, 245 



.1 ukes-Browne, A. J., cited 40 



Juglanuacea;, descriptions of species of 6S?-69£ 



Juglans calil'urnic a Lx 6.S7 



Juglans croscentia, n.sp 689-690, sks 



Juglans denticulata Heer 689 



J uglans ogregia Lx G88 



Juglans lauri folia n.sp 0SS-6S9, 806 



Juglans uigollfl I'ng G91 



Juglnns ruffosa Lx 6*7-6SS 



Juglans Bchlmperl Lx 6SS-6M) 



