834 



INDEX. 



Page. 



Atrypa nriasouriensis Miller 481, 502-504. 580 



Aulopora geonietriea n.sp 492,508-509,554 



Avalanche Peak, dikes and rocks of 305-30G 



Avicula oust a Hall 617 



Avicula linguseformis Evans and Shumard 637 



Avicula raucronata 610 



Avicula nebrascena Evans and Shumaid 637 



Avicula (Oxytoma) mucronata M.and H 616 



Avicula (Oxytoma) wyomiogeusis n.sp 610-617 



B. 



Baculites asper Morton (?) 636 



Baldy Mountain, character of rocks at 340,344 



Bauakite, analyses of 347 



character and occurrence of 347-351 



photomicrograph of 350 



Bannock Peak, features of 31 



section of 32 



view of 32 



Barlow Peak, features of 192-194 



fossils of 193 



Baroda wyoiningeusis Meek 638 



Baronett Peak, view of 204 



Basalt, analysis of 438 



character of 239-240, 241-242 



intermingling of rhyolite and 430-432 



occurrence of 241-242, 275-281 , 3U2-304, 439 



photomicrographs of 250,430 



Basalt-pjrphyry, occurrence of 244 



Basaltic andesite, occurrence of 296, 302-304 



Browne, A. J. Jukes, cited 40 



Bryozoa. descriptions of species of 516-576 



Buffalo plateau, geology of.. 206-207 



Buusen Peak, intrusive rocks of 86-88 



Bysmalith, definition of 17-18 



Basconi, F., cited 63 



Bathyuriscus Meek ( .') 466 



Bathyuriscus sp. undet 476 



Batbyurus conicus Billings 465 



Bear Creek, Montana, analysis of rocks from 352 



Beaverdam Creek, lavas on 340,342,347,350 



Bcchler Canyon, rhyolite of 375-377 



Belemnites densus M.and H 631-632 



Berry Creek, section of rocks on 153-154 



698 

 S12 

 699 

 698 

 69D 

 69S 



Betula elliptica Sap 



Betula iddingsi n. sp 698-699 



Betula lutea Miehx 



Bet ula parcedentata Lx 



Betula prisca Et,t 



Betula stevensoni Lx 



Betulacea?, descriptions of species of 698-699 



Big G-ame Ridge, descriptive geology of 1G5-202 



features of 188-19 1 



Bighorn Pass, features of 24-27 



intrusive sheet at 69-72 



section at 25-26 



Billingsella Hall 450 



Billingsella coloradoeusis Shumard 450-451, 470 



Billingsella pepina Hall and Clarke 450 



Birch Hills, analysis of dacite porphyry of 163 



features of 162-164 



Bobcat Ridge, rocks of 180-181 



Bornemann, J. G., cited 442 



Brachiopoda, descriptions of species of. 502-505, 009-610, 636 ! 



Breccia, acid, occurrence and character of 121-127, 



219-220. 237, 270-274, 2S1-296 



andesitic, occurrence of 4, 56, 91 



basic, occurrence and character of 220-223, 



23S-239, 275-281, 296-298 



Bridge Creek, rhyolite on 386-387 



Brogger, W. C, cited 



Cache Creek, fossil forest on 760 



Camarophoria riugens Swallow 491,537-538,590 



Camaroteeckia Hall 538 



Camarota'chia camanfera Wiuchell ( ') 542 



Camaroto_'cbia herrickana n. sp 539, 541,542, 5y0 



Camarottt-chia metallica "White 489,539,540-541, 590 



Carnarotojcbia orbicularis 543 



I Camarotcechia sappho Hall .... 492,541-542 



Camarotcechia sp 542-543,590 



Cambrian fossils, descriptions of 440-478 



lists of 440-441 



plates showing 46S-478 



Camptonectes (Agassiz) Meek 613 



Camptonectes hellistriatus Meek 61 3-6 14, 642 



Camptonectes bellistriatus var distans n. var 614, 642 



Camptonectes extenuatus (M. and H.) Hall and 



Whitfield 613 



Camptonectes extenuatus (M. and H.) Whitfield. 614,615,616 

 Camptonectes pertenuistriatus Hall aud Whit- 

 field 614-615,616,642 



Camptonectes platessiformis White 615-616 



Capulus paralius Winchell 576 



Carboniferous fossils, table showing rauge of 484-486 



Carboniferous and Devonian fossils, descriptions of. 479-559 



plates showing 5S0-598 



Cardium pauperculum Meek 638 



Cardium shumardi M. and H 621 



Cardium subcurtum Meek 638 



Carpites pedunculatus n. sp 755,546 



Carya autiquorum New by 690 



Castauea ungeri Heer 701,703 



Castanea pulchella n. sp 702-704, S12,S14 



Celastracea-, descriptions of species of 732-T3."> 



Celastrus culveri n.sp 732, SS4 



Celastrus eurvinervis Ward 732 



Celastrus ellipticus n. sp 734,554 



Celastrus ina?qualis n. sp 733,556' 



Celastrus ovatus Ward 699.732 



Cephalopoda, descriptions of species of 630-632, 636, 640 



Cerithium (?) sp 639 



Channel Mountain, features of 196 



Chatard, T. M.. analyses of rocks by 135, 352 



Chemical analyses of rocks. Sec Analyses. 



Chicken Ridge, topographic and geologic features of. 191-194 



Chonetes illinoisensis 526 



Chouetes logani Norwood and Pratteu 528 



Chonetes loganensis Hall and Whitfield 489, 



525-527, S 



Chonetes ornatus Shumard 527-528, 5S6 



Chrustschotf, C von, cited 4]g 



Cinnabar Mountaiu, section of 53-54 



Cinnaiuomum spectabile Heer 722, 838 



Cissus haguei n.sp 741, 842 



Cissus parottia? folia Lx 741 



Cladopora labiosa 501 



Cladopora plnguis 501 



Cladopora sp 500-50 1 



Cliothyris King 566-567 



216 I Cliothyris crassicardinalis White 562,567-568,595 



