VALVATIDE. 15 
2. Family VALVATIDA, Gray. 
Genus VALVATA, Miiller. 
Hist. Verm. II, p. 198, 1774, type V. cristata, Mill.; sect. Tropidina, 
H. and A, Ad., type V. tricarinata, Lesueur ; sect. Cincinna, Hiibner 
(fide Mérch), type Nerita piscinalis, Mill. [ = Valvatinella, Betta, 
1870]; sect. Jelskia, Bourg., Syst. Europ. §c., 1877, type Valuata jelskii, 
Crosse, J. de C. 18638, Rv. Dnieper. 
1. Valvata cristata. 
Valvata cristata, Miller, Hist. Verm. 1774, Denmark. 
4 Middlesex; coll. G. Nevill, Esq. 
6 Bayonne; coll. G. Nevill, Esq. 
1 Aix-les-Bains; coll. G. Nevill, Esq. 
2. Valvata piscinalis. 
Nerita piscinalis, Miller, Hist. Verm. 1774, Denmark ; = V. tolosana, 
Saint Simon, Ann. Malac., 1870, Toulouse, alt. 4, diam. 5 m.; sinistral 
var. Jef., Ann. and Mag. 1878, Sunbury and vars, subcylindrica from 
Grassmere and acuminata from Bristol and Dublin; var, = V.depressa, 
C. Pfr.; sect. Cincinna. 
3 England; coll. G. Nevill, Esq. 
10 Bayonne; coll. G. Nevill, Esq. 
6 Pyrmont, Germany; ex c. Dr. F. Stoliczka, 
80 Pangong Lake, Ladak; coll. Dr. F. Stoliczka, 
4, Kashmir ; coll. Dr. F. Stoliczka. 
7 Canal du Fresquel, Aude: coll. P. Fagot, Esq. (as “ V. tolosana ”). 
I find it impossible to separate these typical specimens of 
V. tolosana, from ordinary V. piscinalis, even as a variety. 
1 Lake Alakul, Siberia; ex c. Dr. H. Dohrn. 
3, Valvata contorta. 
Nerita contorta, Miiller, Hist. Verm. 1774, Denmark. 
11 Laacher See, Rhineland; coll. G. Nevill, Esq. 
8 Aix-les-Bains; coll. G. Nevill, Esq. 
A smaller form than the preceding. 
