I20 LAND AND FRESH WATER MOLLUSKS 



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



Pomatiopsis lustrica 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. 51°, on Hudson Bay. 

 matiopsis lapi- ,_,, . ,, ,, r,.,. 



daria Say "^^ ^^ some doubt as to whether Say's lustrica 



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 VALVATIDJE. 

 Genus Valvata Miiller. 



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

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

 pp. 30, 42, 1801 ; Hist. Moll. Terr, et Fluv. France, pp. 26, 28, 41, 

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

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



Valvata -\- Valvearus Dum^ril, Zool. Anal., p. 164, 1806. 



(.?) Cincinna Hubner, Zwei Briefe, i, 18 10, fide Menke, in Herrmannsen, 

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



^r^rto FiTZiNGER, Verz, p. 117, 1833; type .?.? ^m/a/« Muller. 



^Valvata Fitzinger, Verz, p. 117, 1833; type V. piscinalis {^xHA&x). 



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

 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. tricarinata Lesueur, N. Am. 



Concinna ' Hubner, ' 7?^^ H. and A. Adams, op. cit., p. 343, 1854. 



> Valvata Schluter, op. cit., p. 13, 1854 ; V. piscinalis Fer. 

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



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

 Muller ?) 



> Tropidina Morch (not Adams), Vidensk. Meddel. Kjob., for 1863, p. 320, 



1864, V. minuta Drap., ist sp. 



> 7^/jy^/a Bourguignat, Descr. Nouv. Gen. Alg., 1877, V. Jelskii Crosse, 1863, 



Russia, named for Prof. Jelski, of Kieff. 

 ^Jelskia Westerlund, Fauna Pal. Reg., vi, p. 143, 1886; not ofTacza- 

 novich, Arachnida, 1871, 



> (Tyr^riJw 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 Muller. 



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



