INDEX. 



Accipitres, 







622 



Bad Lands, . 



. 195 



Cenomyce rangiferina, . 





. 37 



A ce ro t he ri u m N e b rasce nsi s , 





556 



Bad Axe, . . 18,47, 



44, 502, 44 



Cephalopoda, 





. 577 



Actmocrinus unicornus, 







593 



Bad River Country, 



. 431 



Ceraurus pleurexanthemus, 





Adams, .... 







521 



Bald Point, . 



. 124 





495, 



496, 504 



Agassizocrinus conicus, 







597 



Baptism River, 



. 364 



Chaetetes capillaris, 





. 137 



Age of Lake Superior Sandstones, 



187 



Barometrical observations, 



. 467 



lycoperdon. 





495, 504 



Agricultural character, F. 



1, 





55 



Barraboo River, . 



18, 520 



Chegwomigon Bay, 





32 



Agricultural character, F. 



3, A 





73 



Barren lands, 



. 215 



Chelonia, 





. 566 



Agriochoerus antiquus, . 







571 



Basaltic beds, 



. 365 



Chippewa Land District, 





. 48 



Alpine plants, 







37 



columns, 



384, 418 



River, 





18, 47 



vErogens, 







621 



Beach-pea, . 



. 37 



Chonetes Iowensis, 





. 584 



Aindi-bi-tunk's sketch of Madeline 





Bedded trap, 



367, 404 



granulifera, 





. 583 



Island, . 







33 



Bellerophon bilobatus, . 

 Beltrami's Pilgrimage, 



. 495, 504 



nana. 





507, 508 



Ambonychia undata, 







504 



. 323 



variolata, 





. 130 



Aminekan River, . 







18 



Bennington Section and Coal, . 118 



Classes of rocks, . 





. 425 



Ammonites Cheyennensis 







578 



Bentonsport, . 



. 109 



Clay-bed of Rum River, 





. 331 



opalus, . 







579 



Black band, . 



. 119 



Clay and drift of St. Louis River, 



lenticularis, 







579 



Black River, 18, 48, 151, 30 



2, 303, 305 







310, 311 



Nebrascensis, 







577 



Black trap, . 



. 430 



Clay and sands of Cass Lake, 



. 324 



Moreauensis, . 







579 



Blue Earth Bluff', . 



. 488 



Clays used for paint, 





. 324 



Amphitheatre of sand, . 







55 



Blue Earth River, 



. 488 



Chfis of F. 2, 



. 6 



5, 66, 68 



Amygdaloid, 364, 369, 372 



381, 



384, 390 



Big Fork, . 



. 218 



Climate, 





. 468 



Analysis of F. 2, . 







59 



Big Bull Falls, . 



. 287 



Clusters of basaltic columns. 



. 358 



F. 3, a, . 







72 



Big Woods, . 



. 99 



Coal, last exposure, Des Moines, 128 



fossil bones, 







604 



Big Fork River, . 



. 319 



Coal-measures of Iowa, 





102, 103 



minerals, . 







600 



Big White Face River, 



. 310 



in Iowa, . 





. 97 



Anchitherium Bairdii, . 







572 



Bitobigungk Bay, . 



. 388 



Coldwater Lake, . 





. 184 



aurelianense, . 







572 



Bois Brule, . 



. 160 



Colymbus glacialis, 





. 160 



Ancient beaches, . 







396 



Bois Franc, . 



34, 36, 483 



Columnar basalt, . 386 



, 401, 403, 405 



River-bed, 







486 



Bonne Femme, 



. 139 



Conchifera, . 





. 582 



Antiquity of the Nebraska foss 



ils* 



201 



Boone County Coal, 



. 124 



Conglomerate, 





. 430 



Apostle Islands, . 







437 



Boundaries of Iowa Coal Field, . 99 



Copper diggings, . 





. 521 



Appendix, 







573 



Boulders of the prairie, 



. 141 



Creek ore, 





. 54 



Arable land, . 







36 



Bowsman, . 



. 24 



boulders, 





. 145 



Area of Iowa Coal Field, 







98 



Brachiopoda, 



. 583 



ore, 





. 306 



Archimedes limestone, 







105 



Bread root, . 



. 37 



veins, 





. 438 



Archaeotherium, . 







198 



Breccia, .... 



392, 430 



Correction line, 





. 152 



Archaeotherium, . 







539 



Brulot, .... 



22 



Cotylops, 





. 540 



Archceotherium Mortoni, 







558 



Brunet's Portage, . 



. 156 



Coscinopora bed, . 

 Conant's Rapid, . 





. 41 



rob us turn, 







572 







. 283 



Arctodon, 







572 



Calymene senaria, 



. 495, 49G 



Council Bluffs, 





17, 132 



Arid lands, . 







22 



Cap des Sioux, 



. 45 



Country between Lake 



Superior 



Arctic plants, 







37 



Canon River, 



. 47 



and the St. Croix, 





. 273 



Arrow River, 







415 



Carboniferous Limestone, . 



. 90 



Country between Lake 



Superior 



Asaphus Iowensis, 







577 



(local details of), . 



. 101 



and the Wisconsin, 





. 278 



Ashawiwisitagon, 







312 



Carboniferous rocks of the 



Dcs 



Court Oreille Lake, 





. 157 



Ashawiwisitagon Lake, 







415 



Moines, 



. 105 



Court Oreille River, 





. 18 



Assiniboin River, 







30 



Cardina nana, 



. 122 



Crepicephalus, 





. 576 



Atrypa reticularis, 





507, 508 



Cariboo River, 



. 370 



Crinoidea, in F. 1, 





. 51 



capax, 





495, 504 



Carlton Peak, 



. 380 



Crinoidea, 





502, 507 



comis, 







583 



Carter, J. 



. 61 



Crow Wing River, 



18, 25 



, 27, 168 



Astrea ananas, 





507 



508 



Cass Lake, . 



25, 323 



Crampton, J. F., . 





. 30 



hexagonum, . 





507, 50S 



Castilleja sessiliflora, 



. 37 



Crane Lake Portage, . 





. 317 



Artesian wells, 







463 



Catalogue of plants, 



. 606 



Cree Indians (civilization ol), 



. 30 











Cedar Bluffs, 



. 113 



Cretaceous system, 





. 18 



Babct's coal, 







117 



Cedar Creek Sections, . 



. 115 



tormation, 





. 195 



