KONGL. SV. VET. AKADEMIENS HANDL. BAND. 19. N:0 6. 197 



3. Onycliocliilus? cocMeatum n. 



Pl. XVIII fig. 54—57. 



Shell SDjall, narrow, siuistral, elongately turriculate. The fragmentary speciraens 

 have only five whorls left. These whorls are short, depressed, nearly discifovm, with 

 an acute ridge around their median line and another ridge on the umbilical side. 

 Transverse lines, regularly distantiated, cross these ridges in a highly acute angle. To 

 judge by the fragments the columellar side of the aperture has been narrow and cur- 

 ved and the umbilicus open and wide. H. 6 mill., br. 4 mill. 



From the limestone beds of Slite and Sandai-fve. 



