KONGL. SV. VET. AlvADEMlKNS IIANULINGAK. BAND. 19. N:o 6. 77 



fragiueiitary. Whorls live, transversf, cariiiated on the dorsal side. Umbilicus o[)en and 

 large with steep borders. The transversal striie of the surface crowded, joining the slit 

 band in an acute angle of 32°, tliey are bent outwards and backwards to the umbilicus. 

 In several speciruens there is an indistinct carina on both sides of the slit band and 

 parallel to it, placed at the point where the transverse striai are bending backwards. 

 The slit band is ehfvated, fiat on its top, (inely and transversally sculptured, somewhat 

 concave along its median line and bordered on each side by two thinedged lines. 



This species makes somehow an approach to the genus Cyrtolites by its acumi- 

 luited dorsal side, its wide umbilicus and its laterally compressed whorls. Height 18 

 millim., breadth lU millim., diameter of umbilicus 4 millim., height of aperture 5 

 niillim. 



Several specimens have been found in the shale at Djupvik in Eksta. 



From the shale beds of Djupvik in Eksta some specimens of Bellerophon have 

 been found along with the former, the aft'inities and exterior characters of which have 

 been obscured through their bad conservation. But when sectioned they exhibit a pe- 

 culiar deviation from the other Bellerophons in being evidently asymetric or having the 

 whorls inclining nearer to the apical side, thus making an approach to a conical-spiral 

 volution. In this respect they coincide with the new genus Stachella, which Waagen 

 has instituted, and wliich chiefly is distinguished through its asymetric whorls. On 

 plate VI the ligures 11, 12 give an idea of these shells. 



6. Belleroplion tubulosus n. 



PI. XIX lig. 6—11. 



Shell globular or splueroidal, with five whorls, thin, excepting around the umbi- 

 lical region. Surface ornamented with narrow, transverse stripes which meet the slit 

 band in an angle of 44°. They are elevated at their superior edge, the more so near 

 the umbilicus, where they also are more numerous. Parallel with this edge they are 

 linely striated. The slit band is narrow and the crescents of growth indistinct and 

 distantiated. The aperture is semicircular and its superior lip is slightly angular. The 

 lips are thin; their inferior side corners arc pi'olonged in earlike lappets, curved like 

 hooks inwards against the very narrow umbilical opening without closing it. During 

 continued growth a tubular space is thus enclosed between the outside of the inferior 

 borders of the aperture and tlie hooklike, lateral prolongations of tlie shell. Where 

 they end they are, moreover, convoluted and directed backwards from the aperture. All 

 around these peculiar umbilical tubes the shelly matter has been deposited to an amount, 

 many times surpassing the thin shell on the dorsal side. In one'specimen, fig. G, tiiere 

 is a trace of a dark colour band around the covered umbilicus. H. i'l mill., breadth 

 16 mill. 



A few specimens have been obtained from the superior limestone near Wisby at 

 Kalens qvarn and inside that town on Kyrkberget. As to sha])e and ornamentation 

 this species somewhat resembles B. fasciatus, though this is more angular on the su- 



