INDEX 



247 



Pyramidula asteriscus 5"/ 

 cronkhitei jo, 51 

 limitaris 4g 

 randolphi (53) 

 ruderata 50, 51 

 soHtaria ^9 

 striatella 50 



Quadrula 133 

 heros 133 

 hippopaea 133 

 lachrymosa 134 

 plicata 133 

 rubiginosa 134 

 undulata 133 



Radix (60), 62, 63, 64, 65, 67, 68, 71, 72 



binneyi 69 



columella 70 



mighelsi 68 



randolphi 71 

 Rivicola (99) 



Sandria 65 

 Saraphia (115) 



tridentata 115 

 Segmentaria (97) 

 Segmentina gj, 98 



armigera 9^ 



christyi gg 

 Selenites 33 



vancouverensis (34) 

 Semilimax (35), (36) 

 Sertularella 200 



conica (201) 



geniculata (202) 



polyzonias 177, 201 



rugosa (201) 



saccata 177, 201-202, 230 



tricuspidata 177, 201 

 Sertularia argentea 179, (202), 204 



cupressoides (203) 



dichotoma (191) 



dumosa (195) 



fabricii (203), 204 



halecina (197) 



muricata ( 198) 



poljzonias (201) 



similis (203) 



Sertularia sjringa (194) 



thuiarioides (204) 



tricuspidata (201) 



variabilis (203) 



verticillata (189) 

 Siphonaria /// 



eipho III 



thersites 11 1 

 Siphonariidae /// 

 Sphaeriidae 134, 145 

 Sphaerium 134 



aureum 135 



cooperianum (139) 



corneum 135 



dentatum 136, /j/ 



emarginatum 138 



fabale 137 



fabalis (136) 



flavum 138 



jayanum 7J9 



lenticula 140 



medium 140 



nobile 137 



occidentale 136, /J7 



partumeium 13^ 



patella 138 



primeanum 141 



rajmondi 138 



rhomboideum 136, 141 



simile 134 



solidulum 136 



spokani 138 



stagnicola 140 



stamineum 136 



striatinum 13^ 



sulcatum (134) 



tenue /J9, 140 



transversum i3g 



truncatum 140 



tumidum 138 



walker i 135 

 Sphjradium ^4 



edentulum 34 

 Spiralina (81) 

 Spirodiscus corneus (81) 

 Spirorbis (82) 

 Stagnicola (60), 62, 64, 68, 71. 72, 74 



adelinae 78 



anticostiana 79 



