Unio, xxix., 71. 
pictorum, 71. 
Unionidae, xxvii., xxix., 71. 
Ungulinide, xxvii., xxx., 75. 
Utriculus, 28. X¢/ 
truncatulus, 28. 
Vv. 
Vallonia, x., 11. 
costata, x., 11. 
pulchella, x., 11. 
Valvata. 
piscinalis, 47. 
cristata, xviii., 48, 
Valvatidee, xvii., 47. 
Valvatella, xxii. 
amabilis, xxii. 
cincta, xxii. 
glauca, xxii. 
groenlandica, xxii. 
helicina, xxi. 
olivacea, xxil, 
undulata, xxii. 
Velutina, xix., 50. 
levigata, xix., 50. 
Veneracea, xxxi., 84. 
Venerida, xxvii,, xxxi,, 
Venus, xxxi., 84. 
aurea, 86. 
casina, 84, 85. 
exoleta, 85. 
fasciata, 84. 
gallina, 85. 
islandica, 76. 
ovata, 84. 
striatula, 85. 
verrucosa, 84. 
84, 
110 
Venerupis, xxxi., 87. 
Trus, 87. 
Vertigo, xi., 15. 
antivertigo, 15. 
edentula, 15. 
minutissima, 16. 
pusilla, 15. 
pygmea, 15. 
var. es 15. 
Vitrea, viii., 
crystallina, vii. 53a 
Vitrina, viii., 3. 
pellucida, 3. 
Vitrinide, viii., 3. 
Viviparida, xviii., 47. 
Viviparus, xviii., 47. 
contecta, 47. 
Voluta, 28. 
tornatilis, 28. 
Volvulella, xii. 
acuminata, xii. 
Volvula, xii. 
Volwulus, xii. 
X. 
Xylophaga, xxxi. 
Z. 
Zonites, viii 
alliarius, 5. 
cellarius, 5. 
crystallinus, 5. 
excavatus, 6. 
nitidulus, 6. 
nitidus, 6. 
purus, 5. 
radiatulus, 6. 
Zonitide, viii., 5. 
Zonitoides, ix., 6. 
excavata, ix., 6. 
nitida, ix., 6. 
Zua, 17. 
lubrica, 17. 
—rZ, a 
