KONfJL. SV. VET. ARAlJiiMIENK HANDMNGAH. 15ANI). 19. N:() 6. Ill 



This is the hir<^est of the (Jotlandic Pleurotomaria^, iittainiii^ a h3ngtli of l,n:{ 

 (leciinetcr and a width of GO iiiilliin. The thickness of the shell iic.ii' tlic uinhiliciis is 

 ;') luilliin. and in the body whorl of the largest specimen 6 in. ni. 



22. Pleurotomaria Otliemensis n. 



PL IX tig. 14— IG. 



Shell elongate, turriciilate, with seven ventricose whorls, which form an obtuse 

 angle along their median line, where the slit band is situated. This band is relatively 

 large, with convex surface, covered with regular, distantiatcd crescents. It is h( iiimed 

 in by two much projecting lamellae which grow out in converging direction. The or- 

 namentation is only transverse, of lamella?, with a ))eculiar wavy or broadly indented 

 edge. The aperture is ovate, the outer lip thin, with the broad slit in the middle, 

 the inner lip a little more thickened, reflexed around the narrow umbilicus. H. 34 

 mill., br. 2.') mill. Apical angle 63°. It has been found in several specimens in the 

 richly fossilifisrous limestone of Samsugn in Othem. It might at first have been taken 

 for a variety of the former. But its more narrow slit band, placed on the median line 

 of the whorls, which are more angular than in PI. validu, and its peculiar ornamen- 

 tation sufficiently distinguish it as an independent species. 



23. Pleurotomaria comata n. 



PI. IX tig. 18—19. 



Shell regularly turbinated with seven ventricose whorls. Slit band placed on 

 the median line of the body whorl, high up near the suture on the lower whorls, con- 

 cave, with the bordering lines only slightly projecting, crescents microscopically mi- 

 nute, crowded. The ornamentation of the surface consists in densely packed, nearly 

 straight, threadtine lines. Aperture ovate, umbilicus open, mirrow. Length 9 millim-, 

 breadth 7 millim. Apical angle 64°. 



Occurs in the shale of Djupvik, from where the State JNIuseum at Stockholm has 

 obtained several specimens. 



It is nearly related to the preceding, but differs through more globose whorls, 

 file higher position of the slit hand and the sculpture of that band, as well as that 

 of the surface. 



24. Pleurotomaria sequilatera Wahlenberg. 



PI. IX fig. 20—29. 



IJrIiiitcx (I'rpiilntrriif: 1818. WAni.RNnEUf; Petrif. Svcc, 7."'). 



182S. lIisiNc. Antcrkii. TV, 2:57. 



') The date of most of tlio spcejis published liy WAlll.KNHF,ar; miist h<: (■liiiiiy:td to 181K instead of 1S21, 

 as so often ii.is lieen used. 111? memoir sPetrificala Tellmis Svccana» in the eitrhtli volume of the »Acta 



