Mollusques terrestres et d'eau douce. 143 



Gen. VAL VATA Müll. 



Testa tliscoidea vel conoidea, antVactibus cylindraceis, peristomate 

 contiimo, acuto. 



1. VALVATA CRISTATA Müll. 



Testa discoidea, supra subplaiia, siibtus coucava, striatula, nitidiila, 

 pallide fusca aut lutescens; anfract. tres, spira immersa et sutura canali- 

 culata. Diani. 2 — 3 ram. 



Valvatu cristata Müller Vcrm. Tlist. II (1774) p. 198. Nilsson liist. ÄIoll. Su. (1822) 

 p. 87. Stein Sclin. u. Mnsch. Rcrl. (18.50) p. 88. t. 2. f. 30. Fritle Norske 

 Moll. (1853) p. 44. Motjuin-Tandon MoU. Fr. Il (185.5) p. 544. t. 41. f. 33— 

 42. Nord, et Nyl. Fini. MoU. (1850) p. tiO. f. 58. Jeffreys Brit. Conch. I (18G2) 

 p. 74. Keeve Brit. Moll. (1863) p. 200. Westerlund Sv. Moll. (1865) p. 117; 

 Coll. Typ. Moll. Su. (1863) n:o 108. 



a plauorbis Drap.: te.sta di.scoidea, supra plana, subtus concava; pe- 

 ristoma simplex, acutum. — Valval t planorbis Dr.\PARNAUD Tabl. 

 Moll. (1801) p. 42. V. cristata MoQ.-Tandon 1. c. fig. .34—36. 



ß spirorbis Drap.: testa discoidea, supra et subtus concava; peristoma 

 reflexiusculuin. — Vahuda spirorbis Draparnaud Hist. Moll. (1805) 

 p. 41. t. 1. f. 32, 33. r. Crist, ß spirorhis MoQ.-Tandon 1. c. f. 

 37, 38. 



Hab. In Suecia in prov. Skåne et Halland pas.sim frequens; in 

 prov. Blekinge rarissima testa (tantura in lacu Wesan a clar. Gosselman 

 et in Tresjön prope Ronneby unicuin specimen a me inventum); in ins. 

 Öland passim frequens; in ins. Gotland in amnibus copiose (Lindström); 

 in prov. Östergötland passim, ad Alva.stra vulgaris; in prov. Wester- 

 götland circa Göteborg vulgaris; in prov. Nerike in omne regione cam- 

 pestri vulgatissima, in reg. silvestri passim (Hartman); ad Stockliolm in 

 Djurgårdsbrunnsviken ad Blå porten, uec non in lacu Badstusjön ad Skuru 

 ladugård (Hartman); in prov. Upland passim; in prov. Westman land 

 vulgaris (Johanson!); in prov. Wermland in lacu Wenern par. Botilssäter 

 (C. Linroth!). Teste celeberr. Nilsson usque in Lapponiam hœc species 

 ascendit. In Norvegia non raro (Friele). 



2. VALVATA MACROSTOMA Steenb. 



Testa subdiscoidea, cornea, nitidula, supra convexiuscula, spira pro- 

 minula, subtus umbilico patulo, distincte et argute transversim striata; «»/>. 

 3 , sutura mediocri disjuncti. Diam. 5—6 mm. 



