Acta Societatis pro Fauna et Flora Fennica, XIII, n:o 7. 147 



Upsala: J. E. Z., in Olandsan ad Stummelbo: P. de L., ad Ra- 

 nas: V. L.), Jemtland (ad Kail: E. K.). — Now. in Osterdalen. 

 — Fennia ad Kuopio (Jynkka, Maljalampi: K. ]\I. L,), Sata- 

 kunta (Eura), ad Kittilii et in flum. Varsuga in Lapponia ros- 

 sica (Mus. Helsingf.). 



S. physale W. (Nachrichtsbl. Mai. Ges., 1893). C. ovata, superne 

 ventricoso-inflata, infra medium eonvexiuscula, ad margi- 

 nes compressa, obsolete striata, pallide citrina, antiee re- 

 gulariter rotundata, postice latior, rotundato-truncata, mar- 

 gine inferiore levissime curvato; umbones tumidi, lati, hu- 

 miles, rotundati. Long. 8, alt. 572, cr. -V-/^ mm. 



Hah. Norvegia in Finmarken in fluvio Pasvig (et in flu- 

 mine Tulom •■•= peninsulas Kola Kossiae), invenit clariss. Ch. Pvabot. 



4. Calyculina CI. C. tenuissima, fyarjilis, striata v. striaiula^ 

 superne utrinque angiilata, margine superiore scepius 

 recto, umbonibus infra latis, sursum angustatis, valde 

 prominentibus, superne mitrella duplicatis. dentibus card, 

 valv. sin. 2, i?i valva dextra 1, nullis in callo positis. 

 f Umbones non inflati, nee incnrvi, mitrella horizontali. 



S. lacustre Mull. (Verm. Hist. II, 1774, Tellina). C. rhomboideo- 

 ovalis, angulata, medio ventrosula, sursum lente inflexa, 

 deorsum valde compressa, ad margines aeutissima, alba v. 

 flavescens, fragilis, nitida, antiee infra paullo angustata, 

 postice latior, subtruncata; umbones submediani, sursum 

 breve celeriterque angustati, mitrella magna, inflata. Long. 

 7^2, alt. 572, cr. 3V2 mm. — Cyclas calyculata Drap. 



Hah. Siiecia raro, ex. gr. ad Goteborg (Qvillebacken, Moln- 

 dalsa et in »Stadsvassen»), Dalsland (in hortu pastoris ad Backe- 

 bol: J. H.), etc. — Dania »in lacubus et paludosis minus fre- 

 quens» (0. MiilL), Kjobenhavn (in hortu botanico),. ad Ruder- 

 hegn et ad Veile. 



Var. mamillare Gass. (MolL de I'Ageuais, 18-49): c. minor, te- 

 nuissima, fragillima, albida, umbonibus leviter convexis, 

 mitrellis maximis, forte iniiatis. — Suecia in Ostergotlaud, 

 in Dalarne (ad Sater et in stagno Ruthens myra dicto). — 

 Fennia ad Furuby in Aland (Mus. Helsingf.). 



S. pilacre W. (Fauna Binnenconch. pal. Reg. VII, 1890). C. ova- 



