INDEX 



Numbers in italic are those of pages on which illustrations (plates or figures) appear; numbers in black-faced type 

 are those of pages on which fossils are described in detail. 



J±. 



Pag 



657 



Abietites dubiusLx. ex. p 



Absaroka liange, analyses of rocks of 272 



Absarokites, analyses of 83, 329, 3^2 



character and occurrence of 328-339 



photomicrographs of 3S2 



Absarokite-shoshonite-banakit6 rocks, character and 



occurrence of 326-355 



Acacia lamarensis n. sp 730, 830 



Acacia macrosperma n. sp 729, 830 



Acacia microphylla Heer 730 



Acacia wardii n. sp 73O,5;30 



Acambona osagensis Swallow 560 



Aceracea?, description of species of 735-7:56 



Acer, fruit of 736, 836 



Acer vivarium n. sp 735-736, 836 



Acer trilobatum productum Heer 735 



Acer trilobatum tricuspidatum Heer 730 



Acrotreta attenuata Meek :..- 449 



Acrotreta gemma Billings 449,472 



Acrotreta pyxidicula White 449 



Acrotreta subconica Meek 449 



Actinostroma sp 496-497 



Actinocrinus viaticus 488 



Agnostus bidens Meek 455,474 



Agnostus interstrictus White 454-455,474 



Agnostus josephus 455 



Agnostus tumidosusH. &. W 455,474 



Allanite, occurrence of 402 



Alnus carpinoidcs Lx 699 



Alum Creek, obsidian near 388 



Analyses of rocks. 61,65, 70, 81, 83, 116, 163, 260, 261, 263, 272. 325 



Amethyst Mountain, fossil forest on 757-752 



Ammonites henry i M. and H 631 



Ammonites placenta De Kay 640 



Amnicola (?) cretacea 633, 648 



Anacardiacea?, descriptions of species of 731 



Anatiua (Cercomya) punctata u. sp 628-629, 6'46 



Anatina (Cercomya) sp 629 



Andes ite, character of 4, 73-82, 122 



occurrence of 4, 24.-246, 314-321 



photomicrograph of 350 



Andesite- porphyry, characters of 16,94-97 



occurrence of ... . 10, 12, 19, 20, 21, 24. 42, 43, 45, 46, 47, 52, 59 



photomicrographs of 62, 104 



Andesitic breccia, occurrence of 4, 56, 270-274 



Andromeda grayana Lx 661 



Anemia subcrelacea (Sap.) Gard. and Ett 657, 658 



Anisotrypa sp 516-5 I 7 



Anomia propatoris "White 637 



Anomia sp 637 







Page. 



Anouiites scabriculus Nor wo 



>d and Fratten 



531 





535 







... 20 23 







... 21,22 







n 



Apatite, occurrence of. 





402 







... 744 



Aralia angustiloba Lx 





745 







748 



Aralia macrophylla Kewby . 





748 



Aralia notata Lx 745-747, S40 



Aralia serrulata n. sp 747-748,545 



Aralia sp 749 



Aralia whitneyi Lx 74£,S3S 



Aralia wrightii n. sp 744-745,547 



Area sp 638 



Archimedes sp 492, 519-520 



Arctostopbylos elliotica n. sp 750-751, S74 



Arctostopbylos uva-ursi (L.) Spreng 750 



Arionellus (Bathyurus) texanus Shumard 460 



Arionellus levis n. sp 462-463,475 



Arionellus sp. undet 463, 47$ 



Arionellus tripunctatus Whitfield 460,461 



Artocarpus incisaL 717 



Artocarpus lessigiana (Lx.) Kn 717 



Artocarpus? quercoides n. sp 716-71S, S24 



Asplenium erosum ? (Lx.) Kn 668-669 



Asplenium hagnei n. sp 655, 794 



Asplenium iddingsi n. sp 666-667, 798, 800 



Asplenium magnum n. sp -. 667, G6S, 798 



Asplenium remotidens n. sp 669,500 



Astarte ineeki n. sp 620,6'^ 



Astarte packardi 620 



Astarte sp 620 



Athyris angelica 505 



Athyris aslilandensis Herrick 502 



Athyris clay toni 489 



Athyris hirsuta 567 



Athyris iucrassata White 48S, 562, 563 



Athyris iucrassata Hall (?) 562-563 



Athyris lamellosa Meek 561 



Atbyris lamellosa Leveill6 561-562, 598 



Athyris inira 570 



Athyris occidentalis 505 



Athyris occidentalis var. triplicata 505 



Athyris planosulcata ( ? ) Hall and Whitfield. . . 489, 553, 554 



Athyris roissyi 566-567 



Athyris royssii AValcott 569 



Athyris vittata var. triplicata n. var .... 504-505, 580 



Atrypa desquamata Walcott 502,503 



Atrypa reticularis L 481, 502, 503, 580 



ss:; 



