156 C A. Westerlund, Synopsis MoUiiscoram Extramarinor. Scandin. 



Var. sphenoides West. (Fauna palararkt. VII 1890): c. perobli- 

 que trigono-ovata v. cuneiformis, modice ventricosa. di- 

 stinctius striata, etiam in apicibus, antice rostriforme per- 

 anguste acuminata, apice pone basin, postice brevissima, 

 alta, supra et infra angulata, verticale subrecte truncata, 

 margine ventrali subrecto, umbones acutiores, altiores; 

 long. 3 — 3Y2, 3,. 2^3 — 27.2, cr. 1% mm. — Destributio eadem 

 ac typi. (P. subtruncatum Cless. in West. Fauna Suec. 1873). 



Var. poulseni Cless. (Mal. Blatt. 1878) : c. tenue irregulariter 

 striata, corneoflavida. antice acuminata, ad aream et areo- 

 lam vix angulata, umbones ventricosi, paullo prominentes; 

 long. 3, a. 272» cr. 2 mm. — Dania ad Fjerdetsen et Byg- 

 hohxi prope Horsens. 



P. scholtzi Cless. (Malak. Blatt. 1871). C. abbreviato-ovata, po- 

 stice brevissima, in linea subrecta et verticali truncata, ad 

 basin rotundato-angulata, ventricosissima, pone ad margi- 

 nem ventralem abrupte compressa, valvis angulum obtu- 

 sissimum formantibus, antice late attenuato-rotundata, mar- 

 gine supero lente arcuatulo-descendente, ventrali stricti- 

 usculo, tenue et regulariter striata; umbones lati, valde 

 prorainentes, ssepius ad apicem late et forte mamillati. 

 Long. 3, alt. 2^5, cr. 2^5 mm. 



Hah. Siiecia ad Ronneby (in Langasjo), Upsala (P. T. C). 

 in Dalarne (Breisvag par. Orsa: P. de L., Styggforsen: P. T. C), 

 Westerbotten (Stromnas ad Pitea). — Norv. in Gudbrandsdal 

 (Bakkejordet in Ringebu et »Hogdatjern>> in Tonset ad 840 

 m, alt. 



Var. lapponicAim Cl. ap. W. (Fauna Suec, 1873): c. minima, 



globosa (seque crassa ac longa), striata et rugis increm.enti 



pluribus, margine inferiore arcuato, umbonibus magnis, tu- 



midis. — Suecia in Dalarne (ad Langhyttan et Kebble 



prope Hedemora), Jemtland (ad Ostersund: E. N.) et Lapp- 



land. (unde Cless. formam a ch Keitel lectam descripsit). 



****) C. snbquadriangulata, rJiomboidea, parte anteriore tan- 



tum paullo longiore, margine ventrali subrecto. postico 



arcuato. 



P. milium Held (Isis 1836). C. ssepius ventricosissima, ad basin 

 angulum obtusum' formans, tenuissime striata, nitidissima, 

 margine dorsali medio subrecto, anteriore reguiariter ex- 

 tense arcuato et ventrali subrecto ad basin protracta et 



