1 63 



Limnaeus dccoUatus (68) 

 elodes (76) 

 elongatus (77) 

 Limnea (60) 



adelins (78) 

 caperata (79) 

 catascopium (68) 

 cochlea (59) 

 columella (70) 

 desidiosa (73) 

 expansa (76) 

 fi-agilis (76) 

 galbana (74) 

 gracilis 60 

 humilis (73) 

 megasoma 60, (67) 

 serrata (69) 

 Limneus (60) 



desidiosus (73) 

 emarginatus (68) 

 minutus (72) 

 oiUariensie (68) 

 palustris (76) 

 slagnalis (60) 

 umbiosus (77) 

 Limnophysa (60), 62 

 holbolli (74) 

 pnlustris 60 

 senegalensis 75 

 vahlii (74) 

 Limnus (61) 

 Liria (m) 

 Liriola /// 



thersites m 

 Lucena (22), 55 

 oblonga 55 

 pulchella 55 

 Lucina lenticula 140 

 Lymna;a 59, 60, 61, 62, 63, 66, 68, 72, 

 100, 102 

 acuta 80 

 adelinse jS 

 ampla 71, 72 

 anticostiana 79 

 appressa (65) 

 arenaria 63 

 atkaensis 66 

 auricularia 60, 61, 62, 64 

 binnevi 69, 70 



Lymnsea bulimoides 78, 79 

 canadensis 68 

 caperata 79 



catascopium 77, 78, 79 

 columella jo 

 desidiosa /j, 75, 80 

 emarginata 6S, 69 

 expansa 77 

 ferruginea 73 

 fossaria 80 

 galbana 7J 

 glaber 60, 62 

 glabra 60 

 gracilis 64 

 haydeni 77 

 holbolli 74 

 humilis /j 

 involuta 64 

 jugularis (65) 

 kingi 64 

 kirtlandiana 72 

 lagorii 61, 63 

 lanceata 72 

 lepida 6y 



malleata 75 



megasoma 63, 67, 70 



mighelsi 68, 72 



nitida 75 



nuttalliana 77 



obrussa 73 



opacina 80 



palustris 62, 64, 68, 75, 76, 78 



pereger 60 



perpolita 78 



petersi 66 



petitii 80 



pingelii (75) 



preblei 70 



proxima 74, 77 



randolphi 66, 7/ 



reflexa 60, 62, 72, yj 



rowelH 76 



solida 78 



solidula 75 



stagnalis 61, 63, 65, 66 



sumassi 66, 69, 71, 72, (77), 78 



techella 78, 79 



tenuicostata 64 



traskii 74 



