KONGL. SV. VET. AKADEMIENS IIANDL. BAND. '9- N:0 6. 141 



to the iimbiliciis thau the exteriör margin, ori the insitle of which a scooped out bclt 

 is formed, heiug bordered by a sharp edge vvhere the umbilicus begins. The striation 

 on the surface is only transversal, slightly bent in a sinus where it crosscs the keel. 

 The striiB are narrow, elevated and thread like. The aperture is transversally ovate, 

 the umbilicus rather narrow. H. 6 mm., br. 17 mm., diameter of umbilicus 5 mm. 

 Another specimen: H. 5 mm., br. 11 mm., umbilicus 3 mm. Two specimens from the 

 shale of Wisby. From Dalhemså, near Nya Slitegårds, the museum possesses a single 

 specimen, which perhaps is only a variety of this species. It is, however, different in 

 not having the inferior keel so prominent and the whorls are convex, not flat between 

 the keel and the suture. On the umbilical side it is more conformed to the former. 

 The shape and sculpture of E. prascursor remind of the far larger species from 

 younger palasozoic formations. 



5. Euomplialus "Walmstedti n. 



Pl. XVIII iig. 12—14. 



Shell discoid, spire on a level with the body whorl, whorls seven. On the 

 apical side a blunt ridge is running longitudinally and the surface of the whorl inside 

 it and the suture is sloping towards the suture or even a little scooped out. The 

 median line of the whorl, on the dividing line of the apical and umbilical side, is 

 obtusely carinated. A little inside the longitudinal axis of the umbilical side there is 

 a sharp, narrow keel, from which the side slopes gently inward. A narrow, sharply 

 defined groove marks the suture on the umbilical side. The transverse striation, the 

 only one extant, is extremely fine and the stria^ are slightly angulated when crossing 

 the inferior ridge. The aperture is transvei'sally ovate, angulated, the umbilicus wide 

 and open. H. 4 mm., br. 13 ram., umbilicus 4 mm. Several specimens have been 

 obtained from tlie red limestone of Sandarfve kulle. There are also specimens from 

 Samsugn in Othem and Klinteberg, which probably are only varieties of this species. 

 They have the whorls more rounded and the keels blunt or nearly evanescent. The 

 wider umbilicus and the conformation of the whorls around it, as well as the quite 

 different striation, distinguish this species from the former. 



Gen. LOXONEWIA Phillips. 



1841 Loxonema Puill. Palaeozoic Poss. Cornwall, p. 98. 



Shell turriculate, toitk long, slender spire of ventricose lohorls; a shallow inclenture 

 occurs in the exteriör lip of the aperture. The lines of growth and also the ornamental 

 ones are bent in an obtuse angle, the apex of which is situated in a line ivith the aper- 

 tural indentation. The axis is solid and the oldest -whorls are filled with an organic 

 deposit of homogenous calcite as in the preceding genus. 



