INDEX. 



885 



Page. 



Cliothyris crassicardinalia var nana n. var 569) 599 



Cliothyris hirsuta 569 



Cliothyris obmaxima 563 



Cliothyris roissyi Leveille 5G6 



Cliothyris roissyi Walcott 302, 569-57 1 



Clisiophyllum teres ri. sp ■'> i £ - ■'* i -~» . 584 



Crelenterata, descriptions of species of 508-515 



Colorado formation, fossils of Giio-606 



descriptions ot fossils of 633 



Columnar CliH, Madison Canyon, view of 36S 



Columnar structure, plate showing 436 



Conant Creek, character of rhyolite on 377-378 



rocks of 161 



Conchita rhomboidalis Wilckcns 523 



Conifene descriptions of species of C70-GN3 



Conocardium napoleonense Winchell 571 



Conocardium pulchellum White and Whitfield 571- 



572, 5S1 



Conocardium semiplennm 571 



Conocardium trigonale Hall 571 



Conocephalites hamulus Hall 4t'l 



Couocephalites wisconensis Hall 461 



Conocephalus antiquatus 456 



Corbula subtrigonalis M. and H 635 



Corhulus subtrigonalis var. perundata 6.35 



Corimya glabra Agassiz 628 



Cornaeere 740 



Cornus acuminata Newby 749 



Corn us newberryi Hollick 749 



Corn us oralis Lx 750 



Cornus paniculata L' Her 710 



Cornus wrightii n. sp 749-750, S4G 



Corylus macquarryi (Forbes) Heer 699, S12 



Cottonwood Creek, Montana, analysis of rock from.. 352 



Coulter Creek rocks of 179-180 



Coulter Peak, rocks of 318-319 



Crags (The) features of 3-5 



Crandall Basin, acid breccia of 237 



basalt flows of 239-240 



basic breccia of 238 



dissected volcano of 245-268 



extent of erosion in 232-233 



intrusive rocks of 240-259 



lava flows of 238-239 



map showing dissected volcano of 216 



Crandall volcano, analyses of rocks of 230-267 



Crania levis Keyes 520-521, 5S6 



Crania modesta 520 



Cianiapormiana 520 



Crania rowleyi 520 



Credneria' pachyphylla n. sp 742, 843 



Credneriacea) 742-743 



Crcpicephalua Owen 459-400 



Crepicephalus iowcnsis 459, 4 GO 



Crepicephalus (Lognnellus) maculosns 4G5 



Crepicephalus (Loganelhis) montanensis 460 



Crepicephalus ounstis 460 



1 repicephalas texauue Shumard 460, 460-461, 478 



Crepicephalus wisconensis 450. 4iil 



Cretaceous fossils, occurrence of 604-607 



description ot 632-640 



Crimson Peak, rocks oi 158 



Cross, Whitman, cited 17 



Crowfoot Ridge, features of 3,5,6,27-30 



fossils of 495 190 



Paleozoic Bcctfon nt 6-8, s 



Crustacea, descriptions of species of 576-578 



Page. 



Crystals in rhyolite, forms of growth, of 410-416 



Cncullea haguei Meek G1S*644 



Cupressinoxylon eutreton Felix 764 



Cyat hophyllum crcspi tosum Goldfuss ( ? ) 481, 500 



Cyperacitesgiganteus n. sp 6S4, S04 



Cyperacites sp 684, 6S5, S06 



Cyperace;e, descriptions of species of 684-685 



Cypricardia batbonica d'Orhigny 623-624 



Cypricardia(?) haguei u.sp 623-624, 644 



Cyprina cinnabarensis n. sp 621-622, C44 



Cyprina (?) iddingsi n. sp 622, 644 



X). 



Dacite, occurrences of 172-173,288-290 



photomicrographs of 104, 130 



Dacite-porphyry, analyses of 65, 163 



character of 64-69, S4-85, 86-8S 



photomicrograph of 62 



Dakot a conglomerate, occurrence of 48, 49 



Dakota formation, fossils of 604-605, 632 



Dakota limestone, occurrence of 49 



Dana, J. D., cited 245,493 



Darwin, Charles, cited 82 



Daubree, A., cited 418 



Derhya keokuk Hall (?) 491,492,524-525 



Devallia? montaua n.sp 671-672, 798 



Devonian fossils, descriptions of .. 496-507 



tablo showing 483 



Devonian and Carboniferous fossils, descriptions of. 479-599 



plates s bowing f)S0-50S 



Dieellocephalua latilrons Shumard 461-462 



Dicellomus Hall 446 



Dicellomus nana 446, 46S 



Dicellomus nanus II. and H 446, 447 



Dicelloii-us politus 446, 46S 



Dielasma burlingtonense "White 545 



Dielasma forraosum Hall 544 



Dielasma rowleyi Hall aud Clarke 545 



Dielasma utah Hall and Whitfield 489,544-545,530 



Dike rocks, characters of 94-97, 128-133 



grades of crystallization of 107-108, 113-114 



variation in mineral composition of 105-113 



Dikes, occurrence of 10, 24, 224-231 



features of 224-231,240-259,304-321 



Diospyros brachysepala Al. Br 75 1 



Diospyros copeanaLx 751 



Diospyros haguei n. sp 752, 753, S40 



Diospyros lamarensis n. sp 751-752, S30,S32 



Diospyros obtusa Ward 752 



Diospyros stecosepala Heer 662 



Diospyros virginiaua L 752 



Diorite, character of 97-103 



mineral composition of 109-113 



occurrence of 252-256 



photomicrographs of 104, 



views of specimens of 100 



Diorite -porphyry, occurrence of 242-240, 252-256 



photomicrographs of 101, 311 



view of specimen of too 



Dombeyopsis platan oides Lx 661 . 796 



Dome (The), features of 12-13 



Bono of contact between intruded sheet and coun- 

 try rocks near. 68 



Donax ctmeata Stun ton 03s 



Donas * f) oblonga Stanton 038 



Dosinio jurassica Whitfield 622 



