KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 6. 47 



Length 51 millim-, breadth near aperture 25 millira. 



Several specimens have been found in the Pterygotus beds between the middle 

 and superior limestones at Vattenfallet near Wisby. 



This and the preceding species form a division of thcii- own witli two septa on 

 each face and the microscopically minute ornamentation. Among coöval species the 

 Bohemian C. nmnita is somewhat reserabling. 



