2o8 



Index 



Modesta (lo) Lea 200 



Modoci (Fluminicola) Hann 142 



Monas (Paludestrina) Pils 138 



Moniliferum (Trypanostoma) Lea 153 



Monodonta (Margaritana) Say 165 



Monodonta (Unio) Say 41 



Monroensis (Bythinella) Dall 138, 141 



Monroensis (Bythinella) Tryon 141 



Monroensis (Hydrobia) Frfld 141 



Monroensis (Littoridina) Frfld 30, 141 



Monroensis (Paludestrina) Dall 138 



Montanensis (Lymnjea) Baker 94 



Moquinianum (Pisidium) Bgt 87 



Miihlfeldianiis plurimaffinis (Unio) DeG. . 183 



Multicarinata (Vivipara) Hald 126 



Multilineatus (Planorbis) Van 102 



Multivolvis (Planorbis) Case 97, loi 



Murrayensis (Goniobasis) Lea 159 



Musculium Link 85,87, 188 



Mytiloides (Pleurobema) Raf 172 



Mytilopsis Con 84 



Nanus (Somatogyrus) Walk 144 



Napoideum (Pleurocera) Lea 152 



Napoideum (Trypanostoma) Lea 152 



Nathorsti (Planorbis) West loi 



Nautileus (Planorbis) Walk 98 



Nyadina DeG 176 



Nebulosa (Lampsilis) Con 181, 182 



Neglectum (Pleurocera) Anth 151 



Neomexicana (Amnicola) Pils 135 



Neoplanorbinse Hann 17, 22, 123 



Neoplanorbis Pils 22, 123 



Neritidse 37. 164 



Neritina Lam 38, 164 



Nevadensis (Fluminicola) Walk 142 



Nevadensis (Pyrgula) Stearns 30, 139 



Nevadensis (Pyrgulopsis) Stearns 139 



Newberryi (Ancylus) Lea 17, 117 



Newberryi minor (Carinifex) Coop 105 



Newberryi (Goniobasis) Lea 155 



Newberryi (Lanx) Lea 117, 118 



Newberryi (Planorbis) Lea i S 



Niagarensis (Physa) Lea 112 



Nicklinii (Physa) Lea no, 112 



Nickliniana (Paludestrina) Lea 29, 138 



Nickliniana attenuata (Paludestrina) Hald. 138 



Nigerrima (Lampsilis) Lea 182 



Nigra (Unio) Raf 174 



Nigra maculata (Unio) Raf 172 



Nigrina (Goniobasis) Lea 155, 156, 159 



Nobilis (lo) Lea 153 



Nodosa (lo) Lea 153 



Nodulata (Obliquaria) Raf 168 



Nolani (Vivipara) Tryon T28 



Nolichuckyensis (lo) C. C. Ads 199 



Novangliae (Ancylus) Walk 119 



Novanglire (Ferrissia) Walk 119 



Noveboracense proclive (Pisidium) Sterki 189 



Nuciforme (Pleurocera) Lea 152 



Nuciforme (Trypanostoma) Lea 152 



Nuttallii (Acroloxus) Hald 117, iiS 



Nuttallii (Lanx) Hald 117 



Nuttallii (Physa) Lea 107, 108, 112 



Nuttallii (Vellettia) Hald 117 



Nuttalliana (Amnicola) Frfld 135, 146 



Nuttalliana (Paludina) Lea 32 



Obesa (Melantho) Lewis 128 



Obesa (Paludina) W. G. Binn 128 



Obesa (Tritogonia) Simp 170 



Obesa (Vivipara) Tryon 128 



Obesus (Melantho) Lewis 128 



Obliqua (Quadrula) Lam. ..166, 167, 168, 169 



Obliquaria Raf 65, 67 



Obliquata (Obliquaria) Raf 186 



Obliquus (Ancylus) Shimek 119 



Obovalis (Obovaria) Raf 167 



Obovaria Raf 66, -jz, 74 



Obovata (Lithasia) Say 35. 150 



Obovata biconica (Lithasia) Pils 150 



Obrussa (Lymnsea) Say 9 



Obscura (Ferrissia) Hald 120 



Obscurus (Ancylus) Hald 12a 



Obstructa (Segmentina) Mor 105 



Obstructus (Planorbis) Mor 105 



Obtusa (Paludina) Lea 136 



Obtusa (Valvata) Dr 131 



Obtusale (Pisidium) C. Pfr 189,200- 



Obtusus (Somatogyrus) Walk. 144 



Occidentalis (Lampsilis) Con 182 



Occidentalis (Physa) Tryon no, 112 



Occidentalis (Planorbis) Coop 101, 104 



Ocmvilgeensis dominus (Unio) DeG 165 



Ohioensis (Lastena) Raf 176- 



Oleacea (Physa) Try no, 112 



Olivacea (Amnicola) Pils 135 



Olivaceus (Planorbis) Spix 11, 94 



Olivaria (Amblema) Raf i8o- 



Oneida (Amnicola) Pils 13S 



Opercularis (Planorbis) GId. 12, 94, 97, loi, 102- 



Opercularis multilineatus (Planorbis) Van. loi 



Opercularis oregonensis (Planorbis) Van. loi 



Opercularis planulatus (Planorbis) Coop.. 96 



Orbiculata (Amnicola) Lea 134 



Orbiculata (Lampsilis) Hild 182- 



Orbiculus (Planorbis) Mor loi, 102- 



Oregonensis (Ancylus) Cless 121 



Oregonensis (Planorbis) Tryon' 102, 104 



Ornata (Goniobasis) Lea i59' 



Osculans (Physa) Hald n3 



Osculata (Goniobasis) Lea 36, 154, is^)- 



Ovalis (Ancylus) Mse i\9 



Ovalis (Ferrissia) Mse it9 



Ovata (Lampsilis) Say 184 



Ovatus (Unio) Say 79' 



Ovoidea (Gyrotoma) Shutt 37 



Ozarkensis (Fusconaia) Call ....171, 172, 174 



Ozarkensis (Goniobasis) Call i59' 



Ozarkensis (Lampsilis) Call 173, jSj 



Ozarkensis (Pyrgulopsis) Hink 140- 



Pallens (Unio) Raf 182- 



Pallescens (Unio) DeG 181 



Pallida (Amnicola) Hald 134. i3S 



Pallidtim (Pleurocera) Lea 151 



Paludestrina d'Orbigny 28, 29, 136- 



Paludosa (Ampullaria) Say 23, 124 



Palustris (Lymnrea) Miill 9' 



Papillosa (Goniobasis) Anth 155 



