248 



Stagnicola bulimoides 79 



caperata 79 



catascopium 77 



communis (76) 



emarginata 68 



palustris 76 



perpolita 78 



reflexa 77 



Stenotrema germanum (25) 

 Strepomatidae 116 

 Striatura milium (43) 

 Strobila labyrinthica 27 

 Strophitus 127 



edentulus (127) 



rugosus I2j 

 Succinea (55), #, 71.105 



alaskana 58 



annexa (59) 



aurelia (59) 



avara 55, 56, 57 



campestris (58) 



chrysis 10, jp 



decampi (56) 



dunkeri 55 



elegans 55 



greeri (58) 



gronlandica^ 



grosvenori 57 



hawkinsij7 



haydeni (56) 



lineata (59) 



minor (56) 



nuttalliana 38 



obliqua j5 



oblonga 55 



oregonensis 36 



ovalis 55, (56), (58), 59 



pfeifferi 55 



putris 55 



retusa (56), 57, 58 



rusticana 38 



sillimani 57 



totteniana 55 



vermeta (57) 



verrilli 57 



wardiana (57) 

 Succineidae 55 

 Succinia (55) 

 Symphynota 131 



INDEX 



Symphynota complanata 131 



costata 131 



katherinae 131 

 Syncoryne 183 



eximia 177, 184, 21O 



Tanousia (61), 62, 65 



Tapada (55) 



Taphius (81), 85 



Teba (39) 



Tellina henslowana (145) 



virginica (141) 

 Thuiaria 202 



argentea 177, 202-203 



coei 177, 203, 234 



costata 177, 205, 234 



cupressoides 177, 203 



elegans 177, 205, 232 



fabricii 177, 203-204, 230 



gigantea 177, 204 



similis 177, 203 



thuiarioides 177, 204 



turgida 177, 204, 232 



variabilis 177, 203 

 Torquis 83, 86 



arcticus 96 



nathorsti 96 



parvus 95 



umbilicatellus 96 



vermicularis 95 

 Trimusculus (in) 

 Trochilus mortoni 40 

 Trochlea (83) 

 Trochovitrina (36) 

 Trochula 40 

 Trochulus (40) 



trochiformis (41) 

 Trochus (39) 



terrestris (40) 

 Trophidiscus (82) 

 Tropidina (120), 121 

 Tropidiscus (81), 82, 85 

 Tropidocyclas henslowana 145 

 Truella (55) 



elongata 55 

 Tubular ia 186 



borealis 187 



elegans 187 



harrimani 177, 186, 214 



