t^^l

TALVATIDJB. 95
Family VALVATID^.
Subfamily VALVATIN.^i.
Shell umbilicate turbinate or siibdiscoidal depressed; labrum
continuous ; operculum inultispiral.
Distribution. Europe, N. Asia, IS". America.
Genus VALVATA.
Valvata, Miiller, Verm. Hist, ii, 1774, p. 198; Zool. Dan. Proiir.
1770, p. 239.
Buccinum, d'Ar^enville.
JVeriia, Geoffroy; Miiller; Schroter; Gmelin; Alien.
Helix, Schroter ; Gmelin; Moutagu ; Alten.
Trochm, Schroter.
C'l/dostoma, Drapernaud ; Voith ; Lesueur.
Turbo, Uonovon ; Poiret; Montagu ; Turton dim.
Valuearitis, Dum^ril.
Paludina, Menke olim ; Michaud; Deahaj-es.
Oijrorhis 8f Valoata, Fitziuger.
Fofuata, Bergtt.
TyPE, Valvata cristata, Miill.; Europe.
Itange. Europe ; N". Asia.
Shell umbilicate, turbinate or subdiscoldal, \vith little exserted
spire, whorls few, not numerous; aperture circular, oblique;
labrum continuous, thin ; operculum multispiral.
186. Valvata piscinalis (Miiller).
'Nerita piscinalis §• pusilla, Miiller, Verm. Hist. pt. 2 (1774),
pp. 171-172.
Trockus ' cristatus, Schroter, Gesch. Fluss-Conch. (1779), p. 280,
pl.6,%. IJ.
Helix piscinalis ^- fascicularis, Gmelin, Syst. jSTat. (1788) pp. 3627,
S611.
Nerita obtusa, Studer, Coxe, Trav. in Switz. iii (1789) p. 436.
Turbo fontinalis, Pulteney, Cat. Shells Dorset. (1799), p. 45.
Turbo cristatus, Poiret, Ooq. de I'Aisne (1801) p. 29 (not of Maton
& Eackett).
Cyclostoma obtusum, Draparnaud, Tabl. I\Ioll. (1801) p. 39.
Valvata minuta, Draparnaud, Hist. Moll. (1805) p. 42, pi. 1,
tigs. ;36-38.
Valvata piscinalis, Ferussac, Ess. Syst. Conch. (1807) p. 75.
Liimniea fontinalis, Fleming, Edin. Encyo. vii (1814) p. 78.
Valoata ohiusa, Brard, Coq. Paris (1815) p. 190, pi. 0, tig. 17.
Turbo tkermalis, Dilhvyn, Uesc. Oat. Shells (1817) p. 852.
Valvata depres^a, C. Pleiffer, Deuts. Moll, i (1821) p. 100, pi. 4,
lig. 33.
Valvata moquiniana, Regnifis, Dupuy,Hist. Moll, v (1851) p. 580,
pi. 28, fig. lo.
The following description of this species, which is widely spread