Inde;x 



2C7 



J.ata (Lastena) Raf ;7S 



Lata (Physa) Tryon 1 1 1 



Lateralis (Obliquaria) Raf 167 



Latissima (Unio) Raf 184 



Lautus (Planorbis) H. and A. Ads 104 



Lawrence! (Goniobasis) Lea 158 



Leana (Pompholyx) H. and A. Ads 105 



Leai (Goniobasis) Tryon 162 



Leait (Goniobasis) Brot 158 



Lefevrei (TruncillaJ Utt 185 



Lecythoides (Vivii)ara) Hann 126 



Lehnerti (Liogyrus) Ancey 147 



Lehnerti (Lyogyrus) Ancey 147 



Lemiox Raf C6, 80, 1 85 



I^ens (Obovaria) Lea 180 



Lens (Planorbis) Lea 98 



Lenticulare (Spbaerium) Sby 188 



Lenticularis (Planorbis) Sby loi 



Lenticularis (Pleurobema) Lea 171, 173 



Lenticularis (Sphsrium) Sby 188 



Lentus (Planorbis) Say 99, loi 



Leptodea Raf 180, 1S2 



Leptodon (Lampsilis) Raf 180, 182 



Leptoxis Raf 163 



Lefiyrium Dall 38, 164 



Lesleyi (Pleurocera) Lea 152 



Lesleyi (Trypanostoma) Lea 152 



r^etsoni (Amnicola) Walker 139 



Letsoni (Pyrgulopsis) Walker ? 39 



Leucophaeatus (Mytilus) Con 84 



Levigata (L'nio) Raf 180 



Lewisii (Campeloma) Walker 128 



Lewisii (Gyrotoma) Lea 162 



Lewisii (Pleurobema) Lea 171 



Lewisii (Pleurocera) Lea 152 



Lewisii (Schizostoma) Lea 162 



Lewisii (Valvata) Curr 131 



Lewisii helicoidea (Valvata) Dall 131 



Lexingtonia Ortmann 43, 51, 174 



Liebmanni (Planorbis) Dkr 94, loi, 102 



Lienosa (Lampsilis) Con 182 



Ligamentina (Lampsilis) Lam 182 



Ligamentinus ( Actinonaias) Lam 75 



Limnophila 5.93 



Limosa (Amnicola) Say ^...133, 134. 135. 136 



Limosa (Paludina) Say 29 



Limosa porata (Amnicola) Say 134 



Limum (Campeloma) Anth 127, 128, 129 



Linearis (Paludina) Kust 124 



Lineata (Vivipara) Kust 124, 125 



Lineata (Vivipara) Val 124, 126 



Lineolata (Neritina) Lam 164 



Lineolata (Obliquaria) Raf 179 



Lioplax Hald 24, 26, 129 



Lithasia Hald 34. 35. i49 



Lithoglyphins Fischer 2t, 30, 141 



Littoridina Soul 28, 30, 141 



Loudonensis (lo) C. C. Ads 199 



Livescens (Goniobasis) Mke 156, 157 



Luteola (Lampsilis) Lam 182 



Lividus (Toxolasma) Raf 180, 181 



Longinqua (Amnicola) Gld 138 



Longinqua (Paludestrina) Gld 138 



Lordi (Physa) Bd 107. m 



Lustrica (Amnicola) Hald 148 



Lustrica (Amnicola) Pils 134 



Lustrica (Paludina) Say 148 



Lustrica (Pomatiopsis) W. G. Binn 148 



Luteocella (Goniobasis) Lea 159 



Lymnaeida; 5, 93 



Lymna;a Lam 5, 6, 93 



Lyogyrinai Pils 27, 33 



Lyogyrus Gill 33 



Lyonii (Goniobasis) Lea 158 



Lyonii (Pleurobema) Lea 171 



Lyonii (Pleurocera) Lea 152, 154 



Lyonii (Strephobasis) Lea 154 



Lyonii (Trypanostoma) Lea 152, 154 



Lyttonensis (lo) C. C. Ads 199 



Maculatum (Pleurobema) Con 172 



Maculatus (Unio) Con 172 



Magnifica (Paludina) Con 26 



Magnifica (Tulotoma) Con 130 



Magnificus (Planorbis) Pils loi 



Magnum (Sphserium) Sterki 188 



Malleata (Physa) Tryon iii, 113 



Malleatus (Viviparus) Rve 126 



Margarita (Physa) Less 112 



Margaritifera (Mya) L 40, 165 



Margaritana Schm 39, 40, 165 



Margaritanidae 39, 165 



Marginata (Alasmodonta) Say 63, 178 



Medionidus Simp 65, 70 



Medium (Cyclas) Sby 188 



Medium (Sphaerium) Sby 186 



Meekiana (Gundlachia) Stimp. ...20. 119, 121 



Megalonaias Utterback 42, 46, 167,171 



Megaptera (Metaptera) Raf 180 



Megasoma (Lymna:a) Say 8 



Megastropha Lea 106 



Melantho W. G. Binn 127 



Meredithii (Pleurobema) Lea 171. 173 



Menetus H. and A. Ads 12, 94 



Mergella (Valvata) West 131 



Merriami (Fluminicola) P. and B. ..141, 142 



Meseschiza Lea 164 



Metanevra (Quadrula) Raf 44 



Metaplata (Unio) Raf 178 



Mexicana (Physa) Phil 1:3 



Mexicana conoidea (Physa) F. and C. ... 112 



Miamiensis (Ampullaria) Pils 124 



Micra (Horatia) P. and F 33, 147 



Micra (Valvata) P. and F 147 



Micra nugax (Horatia) P. and F 148 



Micra nugax (Valvata) P. and F 148 



Micrococcus (Amnicola) Pils 134 



Micromya Simp yd, 78 



Microstoma (Physa) Hald 109 



Milesii (Campeloma) Lea 127, 128 



Milesii (Goniobasis) Lea 159 



Miliaria (Amnicola) Parr 134 



Minor (Anculosa) Hink 163 



Minuta (Cingula) Tott 138 



Minuta (Paludestrina) Tott 138 



Minutissima (Fluminicola) Pils 141, 142 



Minutus (Turbo) Tott 138 



Mississippiensis (Pyrgulopsis) C. and P. . 140 



Missouriensis (Amnicola) Pils 134 



Missouriensis (Pleurobema) Marsh 167 



