247 



Pyramidula asteriscus $1 

 cronkhilei JO, 51 

 limitaris 4q 

 randolphi (53) 

 ruderata 50, 51 

 solitaria ^q 

 etriatella ^o 



QuadruUi 133 

 heros 1^3 

 hippopa-a 133 

 lachijmosa 134 

 plicata 133 

 rubiginosa 134. 

 imdiilata 133 



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



binneji 69 



columella 70 



mighelsi 68 



randolphi 71 

 Rivicola (99) 



Sandria 65 

 Saraphia (115) 



tridentata 115 

 Segmentaria (97) 

 Segmentina gf, 98 



arniigei'a g& 



christyi 99 

 Selenites 33 



vancouverensis (34) 

 Semilimax (35), (36) 

 Sertularella 200 



conica (201) 



geniculata (202) 



polyzonias 177, zoi 



rugosa (201 ) 



saccata 177, 201-202, 230 



tiicuspidata 177, 201 

 Sertularia argentea 179, (202), 204 



cupiessoides (203) 



dichotoma (191) 



dumosa (195) 



fabricii (203), 204 



halccina ( 197) 



mnricata ( 19S) 



polyzonias (201) 



siniilis (203) 



Sertularia syringa (194) 



thuiarioides (204) 

 tricuspidata (201) 



variabilis (203) 



^•erticillata (189) 

 Siphonaria /// 



sipho 1 1 1 



thersites /// 

 Siphonariidse /// 

 SpiiiEriidffi 134, 145 

 Sphserium 134 



aun-um 135 



cooperianuin (139) 



coriieum 135 



dentatum 136, /J7 



eniarginatum 138 



fabale 137 



fabalis (136) 



flavuni 138 



jayanum /J9 



lenticula 140 



medium 140 



nobile /j'7 



occidentale 136, 13J 



partumeium /J9 



patella 13S 



primeanum 141 



raymondi 138 



rliomboideum 136, 141 



simile 134 



solidulum 136 



spokani 138 



stagnicola 140 



stamineum 136 



striatinum 13s 



sulcatum (134) 



tenue i3g, 140 



transversum I3g 



truncatum 140 



tumidum 138 



walkeri 135 

 Sphyradium 34 



edcntulum 34 

 Spiralina (Si) 

 Spirodiscus corneus (81) 

 Spirorbis (82) 

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



adclince 78 



anticostiana 79 



