KONGL. SV. VET. AKADEMIENS HANDL. BAND. 19. N:0 6. 79 



9. Belleroplion elegantulus n. 



Pl. VI %s. 15—18. 



Shell thick, onlobular, urabilicus closed by a convoluted thick fold of the inferior 

 apertnral lip. A little above this fold, there is a transverse groove, partitioned off 

 from the aperture of the shell through a new fold or process which joins the inner 

 snrface of the aperture. Exteriör surface ornamented with regularly distantiated trans- 

 verse lines of growth, which meet the slit band in a very acute angle of 29°, then 

 spread in an arched curve towards the sides. The interstices are densely and longi- 

 tudinaly wrinkled, as seen in the enlarged ligures, giving the surface a finely cancellated 

 appearance. Slit band narrow and raoderately elevated Avith rare, crescent formed 

 wavelets. Height 11 millims; width of aperture 12 millim., height of the same 7 

 millim. 



One specimen has been obtained from the middle lirnestone bands near Wisby. 



10. Bellerophon latevittatus n. 



Pl. VI %s. 26—28, pl. VII figs. 6—8. 



Shell globular, with espanded, transverse aperture. In the only specimen with 

 the shell preserved the height of the aperture is contained nearly four times in its 

 breadth. In casts of other specimens, which are almost entire, it is evident that the 

 exteriör lip has been thin and enlarged. Some two millimeters further inside it is 

 provided with a thick transverse callosity or fold, which continues past the upper side 

 of the umbilicus, along the exteriör sides of the aperture, where it disappears. This 

 callosity gives to the casts a stränge appearance, in a certain way reminding of what 

 is seen in the young Goniatites. But the same kind of callosity also occurs amongst 

 other Gastropoda as for instance Platyceras cornutum. The interiör or lower lip 

 of the aperture seems to have been divided in two lobes, as in young specimens of 

 the Carboniferous Bell. decussatus from Tournai. The umbilicus is open. The orna- 

 mentation of the surface consists of closely set, elevated, transverse lines, which meet the 

 slit band nearly rectangularly. They are closely and longitudinally wrinkled. The slit 

 band is relatively the largest, which any of the Gotlandic species is provided with, ex~ 

 cepting B. gemma, being 1 millim. in breadth on a total diameter of the shell of 

 4 millim. It is elevated but flat. Height 7 millims., breadth at umbilicus 6 millim., at 

 the aperture 10 mm., height of aperture 7 mm. 



Four specimens have been found in the lowest shale beds near Wisby and also 

 at östergarn. 



This species comes near to Bell. latefasciatus Sandberger, Verstein. des Rheini- 

 schen Schichtensystems, pl. 22 fig. 4. 



