288 



INDEX OF GENERA AND SPECIES. 



Pago. 



Cymella bella 101 



meeki 268 



Cymomia laniarckii 222 



Cyphaspis 148,191 



1 bre vimarginatus 191 



christyi 148 



Cyphosoma texanutu 233 



Cypricardella 117, 194, 197 



quadrata 117 



Cypricardia 225, 260, 262 



acutifrons 226 



arcodes 226 



( Avicula ?) veneris 226 



imbricata 226 



occidentalis 333 



piserupta 226 



? rigida 117 



rugulosa 334 



Biliqaa 226 



simplex 226 



sinuosa 334 



Cypricardinia 90,194 



carbonaria 67, 90 



indenta 194 



Cypricardites 54, 55, 79, 248 



? 55 



? carinata 79 



obliqnus 55 



sterlingenais 79 



Cypridae 121 



CypridinidsB 121, 136 



Cyprimeria 92,93,111,269 



? crassa 93 



densata 269 



depressa 269 



excavata 269 



heilprini 369 



spissa 269 



Bubalata Ill 



? tenuis 92 



Cyprina 99,176 



arenaria 18, 47 



compressa 18 



' cordata 18 



Jdallii 176 



humilis 31,47 



laphami 48 



ovata 18,99 



var. compressa 99 



subtnmida 18,48 



Cyprinidffi 260, 266, 268, 271 



Cypris 136 



? 136 



Cyrena 99,135,137,143,158 



arenari a 47 



carletoni 76,158,167 



(Corbicula) cytheriformis 31 



durkeei 66 



dakotensis 99, 167 



holmesi 88 



inflexa 143 



intermedia 15 



moreanensis 15 



occidentalis 15 



Pa-?. 



Cyrena secnris 143 



(Veloritina) durkeei 135 



erecta 137 



Cyrenidae 99, 105, 112, 135 



Cyrtia 119 



cuTvilineata 119 



Cyrtina 57,58,62,193 



billingsi 63 



dalmani 57 



davidsoni 193 



bamiltonensis 62, 193 



panda 63 



triquetra 58 



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



( Aploceras) curtum 46 



oessator 336 



conicam 347 



curtum 35, 27 



dardanns 91 



dictyum 138 



?dilatatum 35, 46 



nevadense 195 



ohioense 67 



ohioensis 81 



sacculum 59 



Cyrtoceratites 81 



Cyrtochilu 103 



Cyrtolites 56,79,121,191,234 



?costatus 79 



dyeri 79 



1 gillianus 131 



imbricatns 56 



(Microceras) inomatus 79 



ornatus 79 



sinuatus 191, 334 



Cysteophyllum 62, 155, 192, 223 



americannm 193 



var. articum ... 02 



vesicnlosnm 155 



Cy stidea 37 



Cystoidea 54, 77 



Cystoseiritesl 227 



Cythere 74,79,121 



cincinnatiensis 68, 79 



nebrascensis 74 



simplex 131 



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



deweyi 15, 48 



lamarensls 48, 159 



lenlicularis 220 



leonen.sis 48,318 



?(Meretrix) dariena? 316 



missouriana 48, 243 



nebrascensis 15, 48 



nuttali 219 



orbiculata 13, 48 



oregonensis 50 



ovata 220 



• owenana 16, 48 



parvnla 331 



pellucida 16, 48 



syriaca 307 



tenuis 13, 48 



texana -.48,318 



