188 G. LINDSTROM, on the SILURIAN GASTROPODA AND PTEROPODA OF GOTLAND. 



ated. H. 17, br. 17. Fragment of a larger specimen 20 mill, broad. In the limestone 

 of Sandarfve kulle, Linde klint and from Samsugn. 



2. Holopea transversa n. 



PI. XV fig. 59-60. 



Shell minute, globose, with acuminate, though short spire, whorls five, ventricose, 

 smooth or glossy, body whorl transverse, aperture obovate, outer lip thin and sharp, 

 inner lip thick, reflexed and hiding the umbilicus. H. 7, br. 7,5 mill. Only a single 

 specimen found in Follingbo. 



3. Holopea perforata n. 



PI. XVIII fig. 45. 



Shell minute, globose, transverse, spire short and acute, whorls five, ventricose, 

 their surface smooth, only transversally wrinkled by a few, depressed lines of growth, 

 directed backwards or nearly vertical. Aperture obovate, or almost circular, both lips 

 thin, the inner one not reflexed. Umbilicus open, relatively wide. H. 12 mill., br. 

 13 mill. Two specimens from Kyrkberget in Wisbj'. 



This species and the preceding one seem to form part of those shells which com- 

 pose the genus Cyclora of Hall, but which well may be united with the Holopeae. 



4. Holopea nitidissima n. 



PI. XV fig. 50—51. 



Shell minute, elongate, with five ventricose whorls, surface glossy, with faint 

 transverse strias. Suture slightly impressed. Aperture obovate, acuminated below, outer 

 lip thin, continuing on the body whorl without meeting the much shorter inner lip, 

 which is reflexed and hides the umbilicus. H. 8 mill., br. 6 mill. From Follingbo and 

 Kyrkberget in Wisby. 



5. Holopea applanata n. 



PI. XV fig. 46—47. 



Shell elongate with five whorls of nearly conical outline, transversally and mi- 

 nutely striated, somewhat concave above the suture, which lies in a groove on the 

 inferior border of the whorls. Aperture obovate, outer lip thin, continuing on the 

 body whorl, without meeting the inner lip, which is thick and reflexed, hiding the 

 rabilicus. H. 10 mill., br. 7 mill. In all seven specimens from Kyrkberget in Wisby. 



