Acta Societatis pro Fauna et Flora Fennica, XIII, N:o 7. 155 



nis multis fuscis, striatula, aiitice angustata, rotundata, 

 margine superiore bene arcuato-declivi, postice JDrevis, late 

 rotundata, margine ventrali valde arcuato; umbones sat 

 inflati. Long. 472, alt. 4, cr. 3 mm. 

 Hah. Norvegia in parte arctica frequens. De ctetero so- 

 lommodo in Helvetia, 2400 m. s. m. 



P. arcticum VV. (Nachr. blatt Mal. Ges., 1893). C. oblique ova- 

 lis, antice rotundato-angustata, postice subperpendiculare 

 truncata, duplo brevior, superne vix ventrosula, infra me- 

 dium compressa, fusco-cornea, dense costulato-striata, sub- 

 sulcata, locis 3 — 4 profundius incisa, margine dorsali et 

 ventrali subaxiualiter arcuatulis; umbones humiles, apici- 

 bus minutis conniventibus. Long. 6, alt. 4^2: cr. 272 mm. 

 Hah. Norvegia in Sydvaranger ad Bosijare prope flumen 



Pasvig, 09°— 70° 1. b. (Gh. R.). 



***) C. oblique acuminato-ovata v. subcuneiformis, valde in- 

 cequilatera, postice hrevissima, verticaliter truncata, um- 



bonibus valde posticis. 



P. siibtruncatum Malm (Goteb. Vet. Saml. Handl. 1853). G. obli- 

 que ovalis, inflate ventricosa, inaxime infra medium, deinde 

 lineis subrectis in angulum rectum declivis, tenuissime 

 striatula, apicibus la^vis, antice plus quam duplo longior, 

 lata, margine sensim arcuato-declivi, rotundata, margine 

 postico leviter arcuato, dorsali et ventrali sat arcuatis; 

 umbones late rotundati, parum prominentes. Long. 374, 

 alt. 2^^, cr. 2 mm. — P. subtr. v. turgidum Gl. in West. 

 Fauna Suec. 



Hah. Siiecia in prov. Skane, Blekinge (Ronneby), Wester- 

 gotland (Goteborg *), Ostergotland, Stockholm (Djurgardsbrunn 

 ad Bla Porten et in lacu Malaren ad 36 — 39 met. prof.), Up- 

 land (Upsala et Harg), Dalarne (in lacu Husbysjon prope Siiter), 

 Westerbotten (ad Roknas pr. Pitea). — Norv. ad Kristiania, 

 Kristiansand (ad »Oddero»), Eger in Modum et ad Bergen. — 

 Dania m Sjselland (Donse, Sor5, Ravenges) et Jylland (ad Hor- 

 sens: H. L.), ad Nyborg (fide Morch). — Fennia in rivulo Pap- 

 pilanoja in Kuopio (Mus. Helsingf.). 



