208 C A. Westerhmd, Synopsis Molluscorum Extramarinor. Scandin. 



4. Sphyradiuni (Ag.). 



P. edentula Drap 



Var. turritella W. . . 

 P. inornata Mich. 

 F. colunieUa G. Mts. . 



G. ! S. S.b. N. iN.b.l F 



5. Isthmia Gray. 



P. costulata Nilss. . . 

 P. odontostoma W. . . 

 P 7ninutissima Hartm. . 



6. JJIa^a Jeffr. 



P. genesii Gredl. 



P. rfzccea W 



P. ceZato W 



P. daliaca W 



Var. dalecarlica W. . . 



P. pineticola W 



P gemma W 



P. ovoidea W 



P arctica Wallenb 



Frm. quadridentata W. 



Var. extima W 



P. alpestris Ald 



Frm. mitis W. . . . 

 Frm. septemtrionalis W. 

 Var. shuttleworthiana (Ch. 



P. eremia W 



P ronnehgensis W 



P. lilljehorgi W 



Var. merita W 



Var. globula W. ... 



P. antivertigo Drap 



Frm. sexdentata Mont. 

 Frm. octodentata St. 



68' 



68' 



68' 



68' 



68' 



63° 



69° 

 64° 



70°' . , 



71' 



71' 



71' 



