288 



INDEX OF GENERA AND SPECIES. 



Cymella bella 101 



meeki 268 



Cymomia laniarckii 222 



Cyphaspis 148,191 



1 brevimarginatns 191 



christyi 148 



Cypliosonia tfxanuui 233 



Cypricardella 117,194,197 



qoadrata 117 



Cypricardia 225,260,262 



acutifrons 226 



arcodea 226 



( A vicula i) veneris 226 



imbricata 226 



occidentalis 339 



piffinipta 226 



?rigida 117 



rugulosa 234 



Biliqua 226 



simplex 226 



sionosa 234 



Cypricardinia 90, 194 



carbonaria 67, 90 



indenta 194 



Cypricardites 54, 55, 79, 248 



? 55 



?carinata 79 



obliquna 55 



sterlingensis 79 



Cyprid» 121 



Cypridinidse 121,136 



Cypriracria 92,93,111,269 



? crasaa 93 



densata 269 



depreasa 269 



excavata 269 



heilprini 369 



spiasa 269 



subalata Ill 



?tenuia 92 



Cyprina 99,176 



arenaria 18,47 



conipreaaa 18 



cordata 18 



?dallii 176 



humilis 31, 47 



laphami 48 



ovata 18,99 



var. corapressa 99 



aubtumida 1 8, 48 



Cyprinidw 260, 266, 268, 271 



Cjrpria 136 



? 136 



Cyrena 99,135,137,143,158 



arenaria 47 



carletoni 76,158,167 



(Corbicula) cytheriformis 31 



dnrkeei 66 



dakotenaia 99,167 



holmeai 88 



inflexa 143 



intermedia 15 



moreanensia 15 



occidentalis 15 



Cyrena aecuria 143 



(Veloritina) durkeei 135 



erecta 137 



Cyrenidao 99,105,112,135 



Cyrtia 119 



curvilineata 119 



Cyrtina 57,58,62,103 



billingai 63 



dalmani 57 



davidaoni 193 



hamiltonensis 62, 193 



panda 63 



triqnetra 58 



Cyrtoceraa 25, 46, 59, 91, 129, 138, 195, 236 



(Aploceraa) cnrtum 46 



ceaaator 336 



conicum 347 



ctirtum 35, 27 



dardanus 91 



dictyum 138 



niilatatum 35, 46 



nevadenae 195 



ohioenae 67 



ohioenaia 81 



aacculum 59 



Cyrtoceratitea 81 



Cyrtochilu 103 



Cyrtolites 56,79,121,191,234 



1 costatus 79 



dyeri 79 



? gillianus 131 



imbricatns 56 



(Microceras) inomatua 79 



omatua 79 



sinuatus 191, 334 



Cysteophylliim 62, 155, 192, 2l'3 



americannm 193 



var. articum. .. 62 



vesiculoaiim 155 



Cy atidea 37 



Cystoidea 54, 77 



Cyatoseiritea? 227 



Cy there 74, 79, 121 



cincinnatienaia 68, 79 



nebraacenaia 74 



simplex 131 



Cytherea 207,211,213,216,218,219 



deweyi 15, 48 



lamarenaia 48, l'>9 



lenticularis 220 



leonensia 48,318 



?(Meretrix) dariena? 316 



miaaonriana 48, 243 



nebrascensis 15, 48 



nattali 219 



orbiculata 13, 48 



oregonensis 50 



ovata 220 



owenana 16,48 



parvnla 331 



pellucida 16, 48 



ayriaca 307 



tenuis 13,48 



texana ..48,318 



