265 



St. Maurice and Ci^aiborne Pei^cypoda 



265 



recurva iii 



rotunda ^o 122 



smithi j<?ii3, 114 



var. subcuneata 20 1 



sublsevigata 201 



sub vexa .^g 119 



var. sylvaerupis. 120 



uhleri 117 



ulrichi •••I13, n? 



IvUtraria conradi 179 



lapidosa 178 



papy ria 178 



petrosa 71, 179 



M 



Macoma daiiai .5/ 169 



scandula 50 161 



sillimani .5/ 169 



Mactra sequorea 177 



decisa 176 



delumbis 175 



dentata 178 



parilis 174 



praetenuis 1 75 



Mactrella prsetenuis 175 



Mactropsis sequorea .^4. 177 



rectilinearis 54 177 



Marcia retisculpta ^7 153 



Martesia elongata 1 96 



texana .59 196 



Mauricia, n. subgen 32 



Meiocardia carolinse 42 135 



Meretrix 134 



sequorea 44 140 



annexa 138 



var. bastropensis ^7 145, 148 



cornelli 46 144 



dalli 152 



discoidalis 146, 149 



hatchetigbeensis 145, 147 



var. lisbonensis^j..i35, 136, 137 



macbeani 44 140 



mercenaroidea -...iSi 



mortoni 43--- 138, 1 39 



neusensis 43 136 



nuttali stock 141 



nuttali ^5 143 



nuttalliopsis 141 



ovata 141 



pearlensis 138 



perovata ^j 138 



perovata stock 135 



poulsoni 46 144 



var. pyga 141 



ripleyana 1 45 



securif or mis 142 



subcrassa //6. .146, 149 



subimpressa 135, 136 



subvitrea 135 



sylv^rupis 43 135 



texacola 44, 4^ 142 



trigoniata stock 145 



trigoniata ^7. . . 146, 149 



vespertina 46 144 



var. winnensis ^(5. ..146, 147 



yoakumi 150 



Micromeris minor 93 



minutissima 32 95 



parva 93 



senex 95 



Modiola tenuis 35 



Modiolaria alabamensis 33 



Modiolus cawcawensis 77 31 



cretacea 31 



ducateli 31 



houstonia ly 32 



spatulata 33 



texanus 77. ..32, 33 



Mcerella i6o 



Montacutaclaiborniana...j7 no 



dalli 108 



Myoparo costata 35 



Mysia ungulina 148 



Neaera alternata 184 



multior nata 1 83 



Nucula bella 64 



brongniarti 57 



calcar ensis 70 



