Mollusques terrestres et d'eau douce. 145 



et in lacu Mälaren ad Westerâs raro (Johanson!); prov. Upland: ad Up- 

 sala (Johanson! Lilljeborg!); prov. Dalarne: in fluvio Dalelfven ad Wå- 

 bäck par. Gustaf (Ridderbjelke teste dar. Johanson!); prov. Jemtland: 

 in Storsjön et ad Krokara in fluvio Ragundaelf (Nyström). In Norvegia 

 ad Christiania (Friele). 



VALVATA "PUSILLA (Müll.), 



Testa solidula, pelliicens, cornea, subviridis, spira sat elevata, apice 

 planiusculo, sutura profunda, striis argutis; umbilicus perspectivus, cylindri- 

 cus; anfr. 4 — A\ nira. Diam. 3 — 2>\ mm. 



Nerita pusiUa Müller Verra. Hist. 11 (1774) p. 171. 



Valvata piscinalis var. a Nilsson Hist. Moll. Su. (1822) p. 86. Valvata piscinalis 



Nord, et Nyl. Fini. Moll. (185G) p. 63. f. 56. 

 Valvata pusilla Mörch Syn. Moll. ünii. (1864) p. 60. 



Hab. In Suecia passim cum prsecedente. 



4. VALVATA ANTIQUA Sowerby. 



Testa ov.ato-conoidea, calcarea (viva viridula), solida, auguste per- 

 forata; spira altissima, contabulata; anfr. 5, ultimus teres; sutura impressa, 

 canaliculata; striai incrementi argutse; testa ssepe spiraliter lineata. Diam. 

 4 — 5, alt. 5 — 6 mm. 



Valvata antiipia Sowerby Mag. of Nat. Hist. 1838 p. 547 teste Morris Catal. of Brit. 

 Foss. ed. 2 (1854) p. 285. Mörch Syn. Moll. Dan. (1864) p. 60. Westerlund 

 Sv. Moll. (1865) p. 119; Coll. Typ. Moll. Su. (1868) n:o 110. 



Valvata contorta Menke Zeitsch. f. Malak. 1845 p. 115. Stein Sehn. u. Musch. Berl. 

 (1850) p. 85. t. 2. f. 27. 



Valvata contorta (i trochoidea Malm Göteb. Vet., Vitt. Sarah:s Handl. Ill (1855) p. 130. 



Hab. In Suecia in maxima orientali parte prov. Skåne: in lacu 

 ad Råbelöf et ad ülsjö (Malm), ad Kragcholm (E. Hemberg!!), in Lyngsjö- 

 sjön (Lilljeborg!!) et in Lefrasjön (0. Nordstedtü); in prov. Östergöt- 

 land copiose in lacu Tåkern. In lacubus Lefrasjön et Tåkern viva oc- 

 currit. 



Fam. PALUDINID^. 



Animal pede magno, antice subtruncato, tentaculis 2, subulatis. Te- 

 sta conoidea vel turrita, epidermide olivaceo, apertura ovali, operculo pyri- 

 formi-ovali, concentrice striato, nucleo lateral! vel subcentrali. 



Nova Acta Reg. Soc. Sc. Ups. Ser. UI. 19 



