300 



INDEX OF GENERA AND SPECIES. 



PagR 



Macrocheilus medialis iJ5,4fi 



newberryi 86 



pallianus 51 



pulchellus 35 



texanus 358 



Macrocyclia 107 



spatiosa 107, 170, 221 



Macrodon 73,86,90,117,197 



? 85 



delicatus 64 



hamiltonse 197 



micronema 40 



obsoletus 69, 90 



parvus 117 



tenuistriata 51, 73 



tenuistriatus ". 41, 85 



tiuncalus 197 



Macrodoutin* 34 



Macioscaphites 104 



Macrura 37, 46, 61, 179 



Mactra 93, 100, 111, 207, 211, 213, 215, 218, 259 



? 217 



alta 16 



arciformis 307 



1 canonensis 70, 143 



(Cymbophora 1) forraosa 100 



gracilis 100 



uitidiila 100 



? siouxensis 100 



? utahensis Ill 



warrenana 100 



diegoana 311, 213 



emmonsi Ill 



formosa 16 



gabiotensis : 317 



gibbsana 37, 93 



gracilis 31 



? holmesi 143 



? incompta 134 



raaia 359 



petrosa 307 



pervetua 307 



siouxensis 31 



syriaca 307 



texana 315,218 



(Trigouella) ? arenaria Ill 



wairenana 16 



Mactridai 100, 111, 134, 269, 271 



Ma^onia 225 



axinia 225 



l carinata 225 



elliptica 225 



elongata 225 



fragilis ; 335 



gigas 225 



gracilis 225 



grandis 225 



myiformis 225 



? recta 225 



valida 225 



Msera 100 



Malea 210 



ringcns 316 



Malletiuas 32 



Margarita 102,264 



Page. 



Margarita abyssinus 48 



nindgeana 102 



nebrascensis 102, 264 



Margaritaua 98 



nebrascensis 99, 167 



Margaritella 102 



abotti 48 



tiexistriata 102 



Marginella biplicata 221 



Marsupiocrinites 42 



Martesia 101, 270 



cuneata 101 



(Pholas) cretacoa 270 



? roessleri 69 



Martinia 30, 31, 41, 44, 63, 130, 131, 155, 193 



Matthevia 199 



variabilis 199 



Mazonia 61 



woodiana 61 



Meekella 72,85, 130, 121,131,177 



striato-costata 72, 85, 121, 131, 177 



Meckoceras 146, 1C2, 339 



aplanatum 146, 102, 339 



gracilitatis 146, 103, 339 



var 146,163 



musbbachanus 146 



uiushbachianum 162, 339 



Megalaapis 126, 129 



belemnurus 136 



belemnura 129 



Megambonia 79, 194 



jamesi 6S, 79 



occidentalis 194 



Megaptera 56, 148 



easel 56 



Mcgistocrinus 82,118,138,351 



crassus 118 



evansii 351 



farnsworthi 138 



parvirostris 82 



plenus 118 



( Saccocrinus) whitei 82 



MBlaaii)U8 158 



1 158,167 



americaua 166, 169 



autiquus 77,108, 167 



? priscus 33 



Mulauia 28, 112, 137, 162 



anthony i 16, 221 



arcta 33,221 



claibomensis 170 



convexa 16, 17 



(Goniobasis ?) sculptilis 65 



8 ubsculptilis 65 



? wyoniingensis 77 



humerosa 33,221 



'. insculpta 162, 160 



iuveuusta 17 



larunda 137 



luiiiutula 16, 221 



niultistriata 16, 221 



nebrascensis 16 



I uitidula 'i'Z 



omitta 17 



(Potodoma) veterna 3 8, 49 



