562 



INDEX. 



Mammoth ledge, prospecting near 242 



Mammoth Lode 58 



Margarita nebraseensis 432 



Margaritella flexistriata 463 



Marsh, Prof. 0. C '. 37,188 



Marvine, Mr. A. P., cited 75, 150 



Maximilian, Prince, exploration by 6 



Meek, Prof. P. B 81,112,151,188 



exploration by 9 



Meek and Hayden's Cretaceous section 171 



Meretrix deweyi 416 



tennis 462 



Meridian distances 544 



Metamoi'phism of Potsdam sandstone 280, 285 



sedimentary rocks by contact with 



igneous 219 



Mica in granite 70 



quartzite 471-474 



Mica-schist 477,480,481 



and slates 47G 



biotite in 477 



brown mica in 477 



crystalline quartz in 477 



cy anite in 478 



hornblende in 477, 478 



magnesia mica in 481 



muscovite in 477 



orthoclase in 478 



white mica in 477, 480 



Mica-slate 476,480,481 



argillaceous 477 



fibrous groundmass of 479 



Microlites in quartzite 473 



sanidin 507 



Microscopic petrography 471 



Mineral, colorless 514 



Minerals in quartzite 472 



Mineral Resources 15, 225 



Report on the 4, 21 



Mining district, Castle Creek 261 



Prench Creek 226 



Spring Creek 238 



Miocene lake 219 



Mispickel 61 



Missouri region, exploration of 5 



Modiola formosa 361 



Monoclinal flexures, duplication of 119, 139, 142 



ridges 32, 175, 177 



Monocotyledones 536 



Monotis curta 354 



hawni .-. 355 



speluncaria 355 



tenuicostatus 354 



Morton, Dr. S. G 6,7 



cited 7 



Myacites (Pleuromya) nebraseensis 461 



subcompressus 368 



subellipticus 461 



Mytilites problemat icus 389 



Mytilus pertenuis 362 



whitei 360 



Natica ambigua 430 



concinua 430 



moreauensis 430 



Natica paludinaeformis 431 



Natrolite 516 



Nautilus dekayi 439 



var. montanaensis 439 



Nesera longirostris 376 



moreauensis ? 420 



ventricosa 420 



Nephelite in phonolite 492, 503 



Newberry, Dr. C. G 19 



Dr.J.S., 106 



cited 131,149,168 



Nicollet, J. C, exploration by 7 



Nosite in phonolite 493, 504 



Nucula evansi 409 



planimarginata 406 



subequilatera 407 



subnasuta 462 



ventricosa 462 



Nuculana bisulcata . ." 407 



equilateralis 408 



subequilatera 408 



Obellapolita 339 



nana 340 



Obolus appolinus ? 339 



? pectenoides 338 



Obsidian 483 



Odontobasis constricta 463 



ventricosa 463 



Old Woman Pork 29,30 



Oligopty chia concinna 463 



Opacite 484 



Opal in rhyolite 522 



Organization for fieldwork 19 



Orthoclase in quartzite 472, 473 



section of banded 525 



Ostrea congesta 462 



englemani 460 



strigilecula 348 



Owen, Dr. D.Dale 8 



cited 97 



Oxytoma mucronata 357 



munsteri 357 



nebrascana 385 



Pachy thasrus evansi 413 



Pakeoehorda prima 331 



Pakeophycus occidentals 101, 104, 200, 332 



tubularis 332 



sp. undetermined 333 



Paleozoic formations 41 



Parks, scenery of 227 



Pasture lands 317 



Patrick, Mr. W. P 19 



cited 121, 162, 163 



Pay gravel, character of 237, 244, 265 



position of 236,237,242,255 



Peale, Dr.A.C 96,150 



cited 112 



Pearlite 483, 485 



Pecten bellistriata 351 



halli 383 



newberryi 350 



rigida 383 



Pentacrinites asteriscus 345 



Pentacrinus asteriscus 151, 345 



