170 



INDEX 



Unio spatulatus (126) 

 trigonus (134) 

 undulatus (133) 

 ventricosus (125) 



Vallonia 22 



albula 23 



asiatica 23 



costata 23 



gracilicosta 23 



minuta (22) 



pulchella 22, 23 



rosalia (23) 

 Valvata 85, (120) 



carinata (121) 



confusa (121) 



cristata 120, 122, 124 



helicoidea 123 



humeralis 121 



jelskii 120, 121 



lewis i 123 



mergella 124. 



minuta 120 



ny landed 122 



piscinalis 120, 121, 124 



sibirica 124 



simplex (121), 122, 123 



sincera 122, (123) 



6triata (123) 



tricarinata 120, /2/, 122 



unicarinata (121) 



virens 124 

 Valvatidae 120 

 Valvearius (120) 

 Velifera 36 

 Velletia (108), 109 

 Velutinopsis (6l), 62, 65 

 Vertigo 3, 29 



approximans (31) 



arctica 32 



arthuri (31) 



binnejana 31 



bollesiana (30) 



borealis 30 



callosa (33) 



castanea (29) 



columbiana 30 



elatior (31) 



gouldii 30 



Vertigo hoppii 29 



krauseana 32 



lagganensis (31) 



milium 32, 33 



modesta 29 



ovata3i, 32 



parietalis (29) 



pentodon (28) 



pygmzeajj 



simplex (54) 



ventricosa 31 

 Vertilla milium (32), 33 

 Vesica (59) 

 Vitrea 38, (40) 



binneyana 39 



fulva (41) 



indentata j>9 



nitidula jp 



radiatula 38 

 Vitrinajj, (36), 37 



alaskana 37, 38 



americana (37) 



angelica; 36, 37 



beryllina 37 



bicolor 36 



conoidea 36 



diaphana 36 



exilisj/, (38) 



lederi 36 



limpida 57 



major 36 



pauluccia; 36 



pellucida 36, (37) 



pfeifferi (37) 

 Vitrinozonites 36 

 Vitrinus (35) 

 Vivipara II 

 Viviparidae 124 

 Vortex 8 1 

 Vorticifex 63 



Zagrabica (61), 65 



brusiniana 65 



naticoides 61 

 Zonites (39) 



conspectus (53) 



fulvus (40) 



lansingi 44 



nitidulus (39) 



