G( rn rat Index — I r ol. VI. 



513 



Monopteria alata 1-7 



gibbosa L29 



loogispina 127 



mariana 128 



subalata 131 



Monotis hawni 132 



Morse, Travis 258 



Mugillidse 383 



Myalina 7. L37 



ampla 139 



congeneris 142 



exasperata Ill 



kansasensis 140 



perattenuata 141 



Bubquadrata 138, 139 



swallovi 137 



Myliobatidse 237 



Mytilidae 7 



\. 



Neotremata 6 



Nucula 8, 149 



beyrichi 119 



cylindrica 165 



kazanensis 118 



missouriensis. 1G5 



pulchella. 151 



ventricosa 150 



Xuculana 8, 118 



bellistriata 148 



bellistriata attenuata 119 



o. 



Odontaspis, sp 249 



Oligoporus 6, 49, 50 



rninutus 49 



Orbiculoidea 6, 55, 5G 



convexa 55, 56 



manhattanensis 55 



missouriensis 55. 56 



Organisms, microscopic 9 



Orthida? 6 



Orthis 62, 67 



arachnoides 62 



carbonaria 90 



crenistria 62, 33 



keokuk 63, 64 



lasalleDsis 62 



umbulacruni 63 



Orthis: 



pecosi 90 



richmondi 62 



robusta (\:\, 64, 65 



striatocostata 65 



Orthisina crassa 62 



missouriensis 65 



shumardiana 65 



Osteoglossidae 340 



Osmeroides 372, -\ l x\ 



Ostiolati 98 



Otodus appendiculatus 217 



divaricatus 218 



sulcatus 2 IS 



Oxyrhina mantelli 246 



P. 



Pachyrhizodontida 1 319 



Pachyrhizodus 349, 393 



caninus 355 



ferox 392 



latimentum 3,57 



leptognathus 351 



leptopsis 351 



minimus 361 



velox 353 



Pachycormidae 363 



Pecten 67 



aviculatus 113 



broadheadi 117 



carboniferus 117 



cleavelandicus Ill 



hawni 117 



providencesis 119 



missouriensis Ill 



occidentalis Ill 



Pecten id;e 7 



Pelecopterus 362 



Pelecopterida* 362 



Pelecypoda 7, 8, 107 



Pelmatozoa 6 



Permian (English i 1 



Perischoechinoida 6 



Phasganodus 57 1 



dims 57ii 



Phialocrinus ''-, .'',6 



magnificus 36 



pelvis 5'.) 



