INDEX. 



561 



Page. 



Icthyosarcolithus coraloida 462 



Ideal restoration of the Black Hills uplift 205 



Idonearea sliumardi 405 



Igneous displacements, relation to main displacements 



of the Black Hills 208 



masses of the Black Hills 44 



matter did not overflow 197 



peaks 189 



and the Bed Bed limestone 133,191 



relation of, to Potsdam 103, 200 



rocks 190,281 



age of the 219 



Inclusions in sanidin 489 



Indians, Dakota 4 



Laoceramus altus 391 



alvcatus 402 



balchii 393 



barabina 398 



confertim-annulatus 39G 



convexus 393,404 



cripsii 398, 404 



var. barabini 39S 



var. sulcatus 404 



cuneatus 398 



ellioti 392 



fragilis 390 



gibbus 398 



iinpressus 402 



mortoni 396 



nel.rascensis 393 



perplexus 392 



problematicus ? 389 



simpsoni 395 



proximus 395, 396 



var. subcircularis 396 



sagensis 393 



var. nebrascensis 393 



sulcatus 403 



sublevis 393 



tenuilineatus 400 



venuxenii 396 



var. ? 398 



Insects, noxious 320 



Interlaminated veins 228 



In y an Kara 197 



[147] 508 



[149 J 508 



[152] 511 



northeast of [150] 510 



north peak of [151] 510 



[166] 514 



westof [157] 512 



Iron Ledge, Box Elder Creek [85] 481 



Iron ore 57, 60 



on Beaver Creek 295 



Box Elder Creek 274 



Isotropic behavior of garnets 422, 474 



mineral 517 



Jasper 473 



Jasper, Hill [92] 473 



Jenney, Mr. Walter P 161,103 



cited 188 



on climate 301 



mineral resources 225 



Joe Peak 159 



Jones, Prof. P. B., cited 86 



36 B H 



Page. 



Jones, Capt. TV. A., exploration by 14, 554 



Jura about Bear Butte 196 



and Bed Beds, separation of 131, 153 



discovery in the Far West 151 



in Belle Fourcko Valley '. 153, 164 



of Europe 151, 167 



thoBl.ckHiUs 43,152 



the Northwest 152 



on Amphibious Creek 158 



Box Elder Creek 159 



Bed Caiion Creek 156 



Bed Water Creek 160 



variation in thickness of the 152, 166 



Jurassic fossils 162, 1G5, 166, 168, 344 



Kensler, Mr. Touissant 292 



King, Mr. Clarence 150 



cited 75 



on the Archaean ■ 48 



Lands, agricultural 314 



grazing 317 



Latitudes 546 



Laurentian formation 46 



Leda bisulcata 407 



evansi 409 



Leidy, Dr. Joseph 8, 9, 1 3, 37, 188 



Leiopistha (CymeUa) meeki 418 



Lesquereux, Prof. Leo 112 



Lewis and Clarke, exploration by 6 



Limestone, glauconitic 475 



Limonite on Box Elder Creek 275 



Lingula antiqua 335 



brevirostra 316 



pinnaformis 335 



(?) polita 339 



Lingulepis cuneolis 336 



dakotensis 336 



pinnaformis 329, 335, 336, 337 



perattenuata 337 



prima , 460 



Lioplacodus vcturnus 461 



Little Missouri Buttes 202 



[107,168] 515 



[169] 516 



Logan, Sir William 47 



Logancllus centralis 341 



Longitudes 544 



Loss in acid 486 



Lower Bapid Creek [71) 480 



Lndlow, Col. William, exploration by 15 



on climate 307 



Lueina occidentalis 409 



var. ventricosa 410 



(Diplodonta ?) subundata 411 



subundata 411 



ventricosa 410 



Lunatia concinna 430 



moreauensis 430 



McGillycuddy, Dr. V. T 19 



Magnetic variations 547 



Magnetite border in biotite 503 



inbiotite 502 



quartzite 472 



rhyolite 488 



submetallic luster of 480 



Mallory, Mr. Thomas H., cited 279,282 



Mammoth ledge 562 



