156 C. A. Westerlund, Synopsis Molluscorum Extramarinor. Scaiidin. 



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

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

 stinctius striata, etiani 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— 3Yo, a. 2V3 — ^Yo- cr. 1% mm. — Destributio eadem 

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



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

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

 1am vix angulata. umbones ventricosi, paullo prominentes; 

 long. 3, a. 272) ^'^' ^ mm. — Dania ad Fjerdetsen et Byg~ 

 holm prope Horsens. 



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

 stice brevissima, in linea subrecta et verticali tr-uncata, ad 

 basin rotundato-angiilata, ventricosissima, pone ad margi- 

 nem ventralem abrupte compressa, valvis angulum obtu- 

 sissimum formantibus, antice late attenuato-rotundata, mar- 

 gine supero lente arcuatiilo-descendente, ventrali stricti- 

 iisculo, tenue et regulariter striata; umbones lati, valde 

 prominentes, saepius ad apicem late et forte mamillati. 

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



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

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

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

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

 m. alt. 



Var. lapponicum CI. ajD. W. (Fauna Suec, 1873): c. minima, 

 globosa (seque crassa ac louga), striata et rugis incrementi 

 pluribus, margine inferiore arcuato, umbonibus magnis, tu- 

 midis. — Suecia in Dalarne (ad Langbyttan et Kebble 

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

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



****) C. siihquadriangulata, rtiomboidea, parte anteriore tan- 

 tum paullo longiore. margine ventrali subrecto, postico 

 arcuato. 



p. milium Held (Isis 1836). C. saepius ventricosissima, ad basin 

 angulum obtusum formans, tenuissime striata, nitidissima, 

 margine dorsali medio subrecto, anteriore regulariter ex- 

 tense arcuato et ventrali subrecto ad basin protracta et 



