188 G. LINDSTRÖM, ON TIIE SILURIAN GASTROPODA AND PTEROPODA OF GOTLAND. 



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

 of Sandarfve kulle, Linde klint and from Samsugn. 



2. Holopea transversa n. 



Pl. XV fig. 59-60. 



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

 smooth or glossy, body whorl transversa, aperture obovate, outer lip thin and sliarp, 

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

 specimen found in Follingbo. 



3. Holopea perforata n. 



Pl. 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 Wisby. 



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 Holopete. 



4. Holopea nitidissima n. 



Pl. XV fig. 50—51. 



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

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

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

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

 Kyrkberget in Wisby. 



5. Holopea applanata n. 



Pl. XV fig. 46—47. 



Shell elongate Avith five Avhorls of nearly conical outline, transversally and mi- 

 nutely striated, somewhat concaA^e above the suture, Avhich lies in a groove on the 

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

 body Avhorl, Avithout meeting the inner lip, Avhich is thick and reflexed, hiding the 

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



