212 



Index 



Theliderma Sw 43> 44 



Tintinnabulum (Anculosa) Lea 164 



Tornhatoni duckensis (Unio) DeG 173 



Torquis Dall 13! 94 



Torsa (Obovaria) Raf 180 



Torta (Melania) Lea 200 



Tortum (Trypanostoma) Lea 200 



Torulosa (Amblema) Raf 186 



Toxolasma Raf 180 



Trabalis (Lampsilis) Con 184 



Tractum (Pleurocera) Lea 151 



Trapezoides (Amblema) Lea 47 



Trapezoides (Quadrula) Lea 170, 174 



Traskii (Physa) Lea 110, 114 



Traskii (Planorbis) Lea •. 103 



Triangularis (Unio) Bar 186 



Triangularis longuisculus (Unio) DeG. . . 186 



Triangularis pergibbosa (Unio) DeG 186 



Tricarinata (Valvata) Say 27, 132 



Tricarinata basalis (Valvata) Van 132 



Tricarinata confusa (Valvata) Walk 132 



Tricarinata infracarinata (Valvata) Van. 132 

 Tricarinata perconfusa (Valvata) Walk. . 132 



Trigonus (Unio) Lea 48, 171 



Triqueter (Truncilla) Raf 81 



Triquetra (Truncilla) Raf 186 



Triquetra triangularis (Truncilla) Bar. . . 1S6 



Triticea (Physa) Lea loS, 113, 115 



Tritogonia Agassiz 42, 45, 170 



Tritogonia (Quadrula) Ort 170 



Trivolvis (Planorbis) Say 



II, 94, 98, 99, 100, 104 



Trivolvis binneyi (Planorbis) Try on 104 



Troostiana (Physa) Lea no, 115 



Tropicorbis B. and P 94, loi 



Tfopidina H. and A. Ads 132 



Tropidocyclas Dall 200 



Tropodiscus Stein 10, 12, 94 



Trothis (Somatogyrus) Doh 146 



Truncata (Truncilla) Raf 179 



Truncatula (Lymnaea) Miill 8 



Truncatum (Musculium) Lind 87 



Truncilla Raf 66,80,81,185 



Tryoni (Anculosa) Lewis 164 



Tryoni (Bulinus) Curr 116 



Tryonia Stimp 28, 29, 139 



Tuberculata (Obliquaria) Raf 49, 171 



Tuberculata (Rotundaria) Raf 170 



Tuberculata (Tritogonia) Bar 170 



Tuberculatus (Unio) Bar 45 



Tuberosus perlobatus (Unio) DeG 167 



Tulotoma Hald 24, 26, 130 



Tumens (Planorbis) Coop loi, 104 



Tumens (Planorbis) Pfr 104 



Tumidus (Planorbis) Pfr 103 



Tuomeyi (Unio) Lea 17S 



Turbiniformis (Amnicola) Tryon 142 



Turrita (lo) Anth 199 



Umbilicata (Anculosa) Weth 164 



Umbilicatellus (Planorbis) Ckll 104 



Umbilicatus (Neoplanorbis) Walk 123 



Umbilicatus (Planorbis) Miill 12, 94 



Umbilicatus (Planorbis) Taylor 104 



Umbilicatus (Somatogyrus) Walk 146 



Umbonatum (Eurycoelon) Lea 



Unakensis (lo) C. C. Ads 



Undata (Quadrula) Bar 



Undata trigonoides (Fusconaia) "Fr." Utt. 



Undulata (Amblema) Bar 



Undulata (Quadrula) Bar 168, 170, 



Undulata pilsbryi (Quadrula) Marsh 



Undulata (Anodonta) Say 56, 



Undulata (Goniobasis) Tryon 



Undulata (Monodonta) Say * 



Undulatum (Pleurocera) Say 



Unio Retz 



Uniomerus Con 43, 



Unionidee 39, 41, 



UnioniuK Sw 42, 



Univittatum (Pleurocera) Lea 



Univittatum (Trypanostoma) Lea 



Urceus (Nerita) Miill 



Utahensis (Lymnsa) Call 



Utahensis (Valvata) Call 



Utterbacki (Pleurobema) Fr 173, 



Validus continuus (Unio) DeG 



Valvata Mull .' 27, 



Valvatidas 23, 26, 



Vanuxemensis (Lampsilis) Lea 



Variabilis (lo) Lea 



Ventricosa (Lampsilis) Bar 



Ventricosa cohongoronta (Lampsilis) Ort. 



Ventricosa satura (Lampsilis) Lea 



Venusta (Anodonta) DeG 



Venusta (Goniobasis) Lea 



Venusta (Lampsilis) Lea . - 



Venusta (Physa) Lea 115, 



Venustum (Pleurocera) Lea 



Venustum (Trypanostoma) . Lea 



Vermicularis (Planorbis) Gld 



Verrucosa (Angitrema) Raf 



Verrucosa (lo) Rve 



Verrucosa (Obliquaria) Raf 



Verrucosa (Pleurocera) Raf 



Versa (Goniobasis) Lea 



Vibex (Lampsilis) Con 



Vinosa (Physa) Gld 



Violaceus (Unio) Speng 



Virens (Planorbis) C. B. Ads 



Virgata (Anculosa) Lea 



Virgata (Physa) Gld 109, 114, 



Virginea (Physa) Gld . 



Virgata alba (Physa) Ckll 



Virginica (Goniobasis) Gmel 



Virginica bilirata (Goniobasis) DeG. .... 



Virginica (Tellina) Gmel 



Virginicum (Pisidium) Bgt 



Virginicus (Somatogyrus) Walk 



Viridis (Lasmigona) Raf 



Viridis (Symphynota) Simp 



Viridis (Unio) Raf 



Viridis fuscata (Unio) Raf 



Viridistriata (Goniobasis) Lea 



Vivipara (Helix) L. . 



Viviparus Mont 24, 



Viviparidae 23, 24, 



Viviparus viviparus L 



62 



200 



88 



146 



177 



177 

 T77 



'77 

 162 

 24 

 124 

 124 

 126 



