Acta Societatis pro Fauna et Flora Fennica, XIII, n:o 7. . 153 



Dania tota (H. Lynge). — Fennia in flum. Ylilne, ad Helsing- 

 fors, Luhanko, Saaminki, Rantasalmi, Kuopio (Mus. Helsingf.). 

 Var. fedderseni W. (Fauna Binnenconch., VII, J890): c. tan- 

 tum sub umbones convexiuscula, de ccetero forte com- 

 pressa, marginibus acutis, tenue et anguste striata, umbo- 

 nes magni, planoconvexi, paullo laterales, infra abscissi; 

 long. 3, alt. 2%, cr. II/4 mm. — Islandia. 



P. lilljeborgi Cl. (Malak. Blatt., 1886). C. oblique ovalis, trian- 

 gularis, inflato-ventricosa, irregulariter striata, sulcis et in- 

 cisuris pluribus, antice acuminato-rotundata, margine brevi 

 declivi, postice brevissima, truncato-rotundata, margine 

 dorsali convexo, ventrali forte arcuato; umbones inflati, 

 late rotundati, valde prominentes, ssepe superne late mamil- 

 lati. Long. 4, alt. 3, cr. 2^2 mm. 

 Hah. Suecia in Jemtland (Froson : E. N.). — Norvegia 



prpecipue borealis multis locis inter Circulum polarem et Mare 



glaciale. — Islandia. — Fennia in Lapp. ross. ad Olenitsa 



(Mus. Helsingf.). 



Var. transversale Cl. I. c: c. obliquior, antice magis attenuata 

 et acuminata, postice fortius truncata, margine ventrali 

 longiore, antice altius ascendente, umbonibus tumido-infla- 

 tis, latioribus et magis prominentibus. — Norv. Troldwand 

 in Trondenses. 



Var. lioyeri Cl. 1. C: c. ovata, forte striata, antice abbreviata, 

 obtusa, postice breve rotundata, superne angulata. — Norv. 

 in ins. Tromso et Eeno. 



t P. Ilndstrbmi CI. (Ofvers. K. Sv. Vet. Ak. ForL, 1888). C. ob- 

 lique ovata, valde inaequilatera, ventricosa, sat regulariter 

 striatula, sulcis pluribus (4 — 6) profundioribus prfedita, 

 antice producta, paullo angustata, late rotundata, postice 

 forte rotundata, margo dorsalis convexus, ventralis forte 

 arcuatus, umbones rotundati, prominentes. Long. 4, alt. 3, 

 cr. 2^2 — 2Y5 mm. 



Hah. Suecia, siihfossilis in stratis postglacialibus ad Al- 

 narp et Hofgard in prov. Skane. 



**) C. oUongo-ovata, striatida v. striata, a?itice patdlo angu- 



stata, rotundata, postice brevis, late rotundata, imihoni- 



bus ad jJd^i^tem posteriorem approximatis. 



P. fontinale C. Pfr. (Naturgesch., 1821). C. ovata, inflato-ventri- 



cosa, tenuis, nitida, striatula, antice paullo elongata, ro- 



