I20 LAND AND FRESH WATER MOLLUSKS 



Paludina lustrica Say, Journ. Acad. Nat. Sci. Phila., ii, p. 175, 1821. 



Pomatiopsis hcstrica BiNNEY, Land and Fw. Sh. N. Am., 

 Ill, p. 94, fig. 189, 1865, Cayuga Lake, N. Y. 



Range. — Eastern North America from Georgia to 

 Iowa and Hudson Bay. 

 Fig. 92. Po- Moose Factory, N. Lat. K\° , on Hudson Bay. 

 matiopsis laii- „, . ■' \ . , , r^ , , 



daria Say. *^ Some doubt as to whether Say s histrica 



is the young of his lapidaria or not. I have fol- 

 lowed the general usage in uniting them. If they should prove dis- 

 tinct it is, according to Mr. Binney, the P. lustrica which occurs in 

 the Northwest and on the watershed south of Hudson Bay. 



Family VALVATID^. 

 Genus Valvata Muller. 



Valvata Muller, Hist. Verm., 11, p. 198, 1774 ; sole ex. V. crisiata Muller, 

 Europe; Zool. Dan. Prodr., p. 239, 1776. — Draparnaud, Tableau, 

 pp. 30, 42, 1 801 ; Hist. Moll. Terr, et Fluv. France, pp. 26, 28, 41, 

 1805. — RoissY, Hist. Nat. Moll., v, p. 379, 1805. — Lamakck, Hist. 

 An. s. Vert., vi, 2, p. 171, 1822. 



Valvata^ Valvearus Du.MfeRiL, Zool. Anal., p. 164, 1806. 



{?) Cinciniia HtJBNER, Zwei Briefe, I, iSio, fide Menke, in Herrmannsen, 

 Ind. Gen. Mai. Suppl., p. 50, 1852. 



(Jyrorto FiTZiNGER, Verz, p. 117, 1833; type .?,? rr«/aAj Muller. 



^I'ah'ala Fitzinger, Verz, p. 117, 1833; type V. piscinalis l^ViWex). 



Planella Schluter, Syst. Verz. Conchyliensammlung, p. 13, 1838; sole e.\. 

 Valvata cristata Muller. 



Volvata Berge, Conch. Buch, pp. 17, 20, 26, 1847 ; err. typ.f 



Tropidina H. and A. Adams, Gen. Rec. Moll., I, pp. 343, 344, 1854, type 

 V. tricarmata Lesueur, N. Am. 



Co7icuina ' Hubner,' yf^'^ H. and A. Adams, op. cit., p. 343, 1854. 



> FrfMiAz Schluter, op. cit., p. 13, 1854; V. piscmalis ¥€t. 



> Cincinna MoRCH, Vidensk. Meddel. for 1863, p. 321, 1864. — Wester- 



LUND, Fauna Pal. Reg., vi, pp. 131, 132, 1886. (Type \'. piscinalis 

 Muller ?) 



> Tropidina MoRCH (not Adams), Vidensk. Meddel. Kjbb., for 1863, p. 320, 



1864, V. minuta Drap., ist sp. 



> /e'MvVz Bourguignat, Descr. Nouv. Gen. Alg., 1877, V.jelskii Crosst, 1863, 



Russia, named for Prof. Jelski, of Kieff. 

 'y Jelskia Westerlund, Fauna Pal. Reg., vi, p. 143, 1886; not of Tacza- 

 novich, Arachnida, 1871. 



> Gyrorbis Westerlund, Fauna Pal. Reg., vi, p. 142, 1886. 



This genus has been subdivided, according to the form of the shell, 

 into the following sections, which appear, however, to have very little 

 value. 



Valvata s. s. ( Gyrorbis Fitz.) Shell planorboid or depressed, 

 without spiral keels. Type V. cristata Miiller. 



Cincinna Morch ( Valvata Fitz.). Shell turbinate, with a mod- 



