VALVATID.E. 



Family VALVATID/E. 



Subfamily VALVATINJ3. 



Shell umbilicate turbinate or subdiscoidal depressed ; labriun 

 continuous ; opercuium multispiral. 



Distribution. Europe, N. Asia, IN". America. 



Genus VALVATA. 



Valvata, M tiller, Verm. Hist. ii, 1774, p. 198; Zool. Dan. Prodr. 



1776, p. 239. 

 Buccinum, d'Argenville. 



Nerita, Geoffrey ; Mtiller ; Schroter; Grnelin ; Alien. 

 Helix , Schroter ; Ginelin ; Montagu ; Alten. 

 Trochus, Schroter. 



Cyclostoma, Drapernaud ; Voith ; Lesueur. 

 Turbo, Donovon ; Poire t ; Montagu ; Turton olim. 



Valoearius, Dumeril. 



Paludina, Menke olim ; Michaud ; Ueshayes. 



Gyrorbis fy Valvata, Fitziuger. 



Volvata, Berge. 



TYPE, Valvata cristata, Miill. ; Europe. 



Itange. Europe ; JN". Asia. 



Shell umbilicate, turbinate or subdiscoidal, with little exserted 

 spire, whorls few, not numerous ; aperture circular, oblique ; 

 labrum continuous, thiu ; operculuin multispiral. 



186. Valvata piscinalis (Miiller). 



Nerita piscinalis fy nusilla, Miiller, Verm. Hist. pt. 2 (1774). 



pp. 171-172. 

 Trochus cristatus, Sehroter, Gesch. Fluss-Conch. (1779), p. 280, 



pi. 6, fig. 11. 

 Helix piscinalis fy fascicularis, Gmelin, Syst. Nat. (1788) pp. 3627, 



3641. 



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 1'Aisne (1801) p. 29 (not of Matoii 



& Rackett). 



Cyclostoma obtusum, Draparnaud, Tabl. Moll. (1801) p. 39. 

 Valvata minuta, Draparnaud, Hist. Moll. (1805) p. 42, pi. 1, 



tigs. 313-38. 



Valoat.a viscinalis, Ferussac, Ess. Syst. Conch. (1807) p. 75. 

 Lymncea fontinalis, Fleming, Edin. Encyc. vii (1814) p. 78. 

 Valvata obtusa, Brard, Coq. Paris (1815) p. 190, pi. 6, fig. 17. 

 Turbo thermalis, Dillwyn, Desc. Cat. Shells (1817) p. 852. 

 Valvata depress, C. Pfeift'er, Deuts. Moll, i (1821) p. 100, pi. 4, 



fig. 33. 

 Valvata moquiniana, Regnies, Dupuy, Hist. Moll, v (1851) p. 586, 



pi. 28, fig. 15. 



The following description of this species, which is widely spread 



