88G 



INDEX. 



Page. 



Dryophyllum aq nam arum "Ward 711 



Dryophyllum longipetiolatum n. sp 7 10, S 10 



Dryopliyllam subfalcatum Lx 711 



Dryopteris weedii n. sp 669-670, 80S 



Dryopteris xautholitbense n. sp 671, SOS 



Eagle Peak, view of 296 



Eakins, L. G-, chemical analyses of rocks made by. . 135 



260-2G1, 325, 329, 340, 347, 352 



Ebenacea? 751 



Echo Peak, analysis of rocks of 05 



bandiDg in rocks of 07-G8 



view of 68 



Echinoidea, descriptions of species of 609 



Echinodcrinata, descriptions of species of 515-516, 60S 



Edwards and Haime, cited 498 



Electric Peak, analyses of intrusive rocks of 115-121 



chemical correlation of rocks of Sepnlchre 



Mountain wi tb those of 142-148 



comparison of rocks from Sepulchre Mountain 



and 138-148 



diagram showing molecular variation of rocks at. 119 



diagram showing variation m silica percentages 



of rocks at 117 



features of 50-55, 89-92 



geologic map of 96 



grades of crystallization of rocks of 107 



igneous rocks of 89-148 



intrusive rocks of 92-121 



location and altitude of 1 



mineral and chemical composition of intrusive 



rocks of 105-121 



notable intrusive sheet at 82-84 



order of eruption of rocks at 140 



porphyries at 94-97 



quartz-mica-diorite-porphyry at 103-105 



sections at 50-51, 53-54 



stock rocks and apophyses at 97-103 



views of 90 



Ela?odendron polymorphum Ward 734-735, 834 



Ellis formation, fussils of 174, 176 



Ellis sandstone, fossils of. 197 



Endotbyra baileyi 599 



Endotbyra baileyi var parva n. var 492, 507, 599 



Endothyrahowmani 507 



Endotbyra lobata 507 



Equisitacea?, descriptions of species of 674-676 



Equisetum canaliculatum n. sp 675, 676, S02 



Equisetum deciduum n. sp 676, SO 2 



Equisetum haguei n.sp 674, 80S 



Equisetum hiemale 676 



Equisetum lesquereuxii Kn 675 



Equisetum limosum L 674, 675 



Equisetum robustum 676 



Ericaceae 750 



Eridopora (?) sp 517 



Etna (Mount), profile of 232 



Eumetria altirostris White 560 



Eumetria vera 560 



Eumetria verneuiliana Hall 491, 493, 560-561, ;"57 



Eumetria verneuiliana Whitfield 560 



Eumicrotiscurta (Hall) Meek and Hayden 017 



Euomphalus luxus White 489, 573 



Euomphalus (Straparollus) opbirensis 489 



Euomphalus (Straparollus) utahensis Hall and Whit- 

 field 489,573 



IF. 



Page. 



Fagacea?, descriptions of species of 700-702 



Fagus antipofii Abich 700 



Fagus atlantica Ung 



Fagus castan ere folia Ung 



Fagus dentata Gbpp 



Fagus feronipe Ung . 



Fagus ferruginea Ait 



Fagus undulata n. sp 



Falls River Basin, basalt in 



rhyolite in 



Fan Creek, rocks on and near 43-44, 4. 



701 



701 



700,701 



701 



700 



700-703, 703, SI? 



435 



377-379 



46, 47, 48, 58 



sections on and near 48,58 



Fan Pass, rocks of 49 



section at 49 



Fan (The), features of 45-50 



Favosites sp 5Ol,5S0 



Fawn Creek, rocks on 43 



Fawn Creek Valley, features of 39^0 



section in 38 



Fawn Pass, formations exposed near 42-43 



rocks near 43 



Feldspar microlites, photomicrograph showing 422 



Feldspar needles, photomicrograph showing 414 



Fenestella Lonsdale 51 S-51 9 



Filices, descriptions of species of 605-673 



Ficus asimina?folia Lx 713, 716 



Ficus deformata n.sp 712-713, 828 



Ficus densifolia n.sp 714-715, SlS y S20,S28 



Ficus haguei ii.sp 715-716,550 



Ficus shortensis? Lx 714 



Ficus sordida Lx 7 14 



Ficus sp 7 13,818 



Ficus tilia^folia? Al. Br 7 16 



Ficus ungcri Lx 713, 880 



Flat Mountain, rocks and fossils of 19G-197 



Flora, fossil, description of 651-882 



plates showing 794-SS2 



Forellen Peak, rocks of 158-159 



Forests, fossil 755-760 



Fort Ellis, Montana, analysis of rocks from 352 



Fraxinus aftinis Xewby 739 



Fraxinus denticulata Heer 662, 7.%" 



Fraxinus heerii Lx 753 



Fraxinus wrightii n.sp 753, S20 



Friedel and Sarasin, cited 418 



Gabbro. occurrence of 246-252 



photomicrograph of 250 



Gabbro-porphyry, occurrence of 242, 246-252 



Gallatin fault, course of 30 



Gallatin Mountains, descriptive geology of 1-59 



extrusive rocks west and southwest of 137-138 



geologic cross sections of 12 



intrusive rocks of 60-85 



map of 56 



panoramic view of IS 



Gallatin River, geology of region north of 41-50 



laccolithic mass on 84-85 



section near 58 



Gallatin Valley, features of 27-30 



Gardiner River, rocks near 45 



Gastropoda, descriptions of species of 505-507, 



629-630, 632-633. 639 



Geikie,A.,andTeall ( J. J. H., cited 67 



Geonomites schimperi Lx 65S 



