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



umbones versus declivis, margine dorsali postice declivi, 

 rostro supra et infra angustato, vix compresso, lateribus 

 arcuatis; long. 30-33, lat. 16—18, alt. 13—15 mm. — Dania 

 ad Kjobenhavn. 



Forma ampla mh., concha multo latior quam alta, magna; 

 long. 36—42, lat 23—27, alt. 15—16 mm. — Dania ad 

 Kjobenhavn (Osterbro.) 



