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



nis multis fuscis, striatula, antice angustata, rotundata, 

 margine superiore bene arcuato-declivi^ postice brevis, late 

 rotundata, margine ventrali valde arcuato; umbones sat 

 inflati. Long. 4V2, alt. 4, cr. 3 mm. 

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

 lummodo in Helvetia, 2400 m. s. m. 



P. arcticum W. (Nachr. blatt Mai. 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 subtequaliter arcuatulis; umbones humiles, apici- 

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

 Hah. Norvegia in Sydvaranger ad Bosijare prope flumen 



Pasvig, 69°— 70°*1. b. (Ch. R.). 



'•'**^ C. ohlique acuminato-ovata v. siibcuneiformis, valde in- 

 cequilatera, postice hrevissima, verticaliter triincata, imi- 

 honihus valde 'posticis. 



P. subtrimcatum Malm (Goteb. Vet. Saml. Handl. 1853). C. obli- 

 que ovalis, inflate ventricosa, maxime infra medium, deinde 

 lineis subrectis in angulum rectum declivis, tenuissime 

 striatula, apicibus laevis, 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. 3V4, 

 alt. 2^/.5, cr. 2 mm. — P. subtr. v. turgidum CI. in West. 

 Fauna Suec. 



Hah. Suecia 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). — Now. ad Kristiania, 

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

 Dania in Sjoelland (Donse, Soro, Ravenaes) et Jylland (ad Hor- 

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

 pilanoja in Kuopio (Mus. Helsingf.). 



