IISTDEX. 



Page. 



Abstract of report on geology of the 

 Eureka District, Nov., by Arnold 



Hague 237 



Accompanying papers 43 



Acid rocks of Keweenaw Series, Origin of. 125 

 Acrotreta gemma 258, 259, 2(31 



prospectensis 256 



Administrative report of chiefs of divis- 

 ions and heads of parties 1 



Affinities of Hesperornis 68 



Agassiz, Alexander, referred to 153 



A gate Bay group of the Keweenaw Series 116, 



145, 187 

 , Minnesota 108,117 



Harbor, Keweenaw Point, Mich 17 G 



Agnostus bidens 258,259,261 



communis 257, 258, 259, 261 



neon 258,259,261 



prolongus 259 



richmondcnsis 258 



scclusus 258 



tumidosus 259 



tumifrons 259 



Ajjogebic Lake, Mich 136, 147, 163, 165 



Albany and Boston conglomerate 114, 131 



Algoma Mine, Canada 159 



A lhambra Hills, Basalt of 286 



AllomzMine, Mich 121 



Alpha Peak, Altitude of 246 



Altamont moraine 378,388,393 



American Museum of Natural History, 



Continued courtesies of the xvii 



Amygdaloids of the Keweenaw Series de- 

 scribed - 116 



Analyses of brine from Lake Lahontan 



Basin 226 



river water given by Bischof 212 



tho water of Great Salt Lake 212 



tufa from Lake Lahontan Basin 216 



Anclyus undulate 451 



Ancylidae 451 



Andesitic pearlites, Position of 281 



Auimikio group 124, 135, 157 



.Apparent thickness of, in Thunder 



Bay region 160 



at Grand Portage Bay, Minn 143, 157 



at Pokcgama Falls, Minn 161 



, Coarse gabbro dikes of, on Pigeon 



Point and Thunder Bay 1 58 



, Dikes in the 158, 160 



, Intel bedded eruptives of 158, 163 



in tho Mesabi Range, Minn 161 



, Magnetitic beds of 161 



on Pigeon Point 141, 158 



Aniinikie group on the Kaministiquia, 

 River, Canada 



Saint Louis River, Minn 



, Relation of, to Keweenaw Series . . . 



, Similarity of, to Penokee Huvoniau . 



rocks of Guuflint Lake, Minn 



Anodonta ? angustata 



? catskillensis 



decurtata 



parallela 



propatoris 



in Lake Lahontan Basin 



Anomia gryphorhynchus 



micronema 



propatoris 



Anomiidae 



Anorthite in augite-andesite 



rock of Keweenaw Series described. .. 



Antelope Hills 



Anthracopupa ohioensis 



Apatornis 



Apostle Islands, Wis 



Archceopteryx compared with Hesperor- 

 nis and Ichthyornis 



Arethusina americana 



Arionidae 



Artesian water on the plains 



Asaphus gigas 



Asar defined 



Ashbed diabase of Keweenaw described. 

 "Ashbed" of Keweenaw Point, Mich. 109, 

 Assistants, chief, Monographs neai ly com- 

 pleted by the 



, , Workoftho 



Athyris subtilita 



Atlantic mine, Mich 



Atlas of the Eureka District 



Atrypa Peak, Altitude of 



, Devonian of 



Atrypa reticularis 



Augite-andesite, Eureka District 



281, 283, 

 of Cliff Hills..... 



, Richmond Mountain 



Augite-syenite described 



Auriculida) 



Australia, Terraces on the coast of 



Babylon Hills, Devonian limestone of 



Bad River country, Wis..H5, 119, 122, 130, 



174, 177, 



gabbros,. Relations of, to Huronian. . 



region, Great thinning of rocks in . . 



, Wis., Coarse gabbros of 



(551) 



Page. 



158 

 162 

 135, 



157, 163 

 158 



159,161 

 424 

 424 

 479 

 429 

 429 

 221 

 422 

 242 

 422 

 421 

 278 

 97 



388, 393 



456 



69 



133, 155 



3 



259, 261 

 452 

 xvi 

 262 

 299 

 108 

 119, 127 



xv 



xvii 

 269 

 182 

 242 

 246 

 266 

 266 



277, L'80 

 287, 290 



282 



278, 282 

 114 

 443 

 207 

 267 



134, 136, 



180, 18G 



135 



163 



134 



