Taf. XXI. 
Fi g. 
1- 
3. 
Valvata 
debilis Fuchs. 
n 
4- 
6. 
77 
simptex Ftichs. 
77 
7 — 
9. 
77 
bicincta Fuchs. 
77 
10- 
12. 
77 
carinata Fuchs. 
77 
13- 
■ Iß. 
77 
gradata Fuchs. 
77 
17, 
18. 
77 
Balatonica Rolle. 
77 
19, 
20. 
» 
tenvistriata Fuchs. 
