KONGL. SV. VET. AKADEMIENS HANDL. liANl). 19. N:o 6. 147 



2. Troclius fulminatus n. 



PI. XIV tig. 12—13. 



Shell small, broadly conical with five veritricose whorls and deep suture. The 

 ornauientation is peculiar and cliaracteristic. The distiuitiated, transverse lines are a 

 little below the middle of the whorls suddenly bent in an obtuse angle, thus forming, 

 as it were, a lower field of striie on the belt next above the suture. The aperture is 

 transversally obovate, the lips thin, the umbilicus closed and the central part of the 

 umbilical face deeply depressed and surrounded b}' n low ridge. H. lU millim., 

 br. 10 mm. 



A few specimens of this characteristic little shell have been found in a white 

 crystalline limestone north of Wisby, along the shore of Westkinde and Lummelund. 



3. Troclius mollis n. 



PI. XIV tig. 14—17. 



Shell large, broadly conical, of six tumid whorls, which are only obtusely cari- 

 nated between the apical and the umbilical surfaces. The sculpture differs totall}' 

 from that of the preceding ones and consists only in microscopically minute, transverse 

 striag, very regularly distantiated from each other. The aperture is obliquely elliptical, 

 the outer lip thin and sharp, the interior lip strongly refiexed or thickened. Tiie 

 umbilicus is almost hidden through it and is only discerned as a narrow slit. 



H. 21 millim., br. 27 millim. 



Some specimens have been found in the limestone of Klinteberg and Samsugn, 

 and also in Lilla Carlso, from where the Mineralogical Museum of Copenhagen has 

 obtained a specimen. 



4. Troclius Stuxbergi n. 



PI. XIV fig. 59—69. 



Shell small, obtusely conical of live or six whorls, which are ventricosc, most 

 tumid near their inferior edge and the sides above nearly vertical. The ornamentation 

 consists of sigmoid, obliquely transverse, laminar strite. The uml)i]ical and the a])ical 

 sides are se]jarated through a horizontal ridge, the extreme, thin margins of which are 

 much broken and jagged and are left behind in their old place on the older whorls, 

 having coalesced with the shell. The thin edges of this ridge form an upwards direc- 

 ted rim around the umbilical surface giving it a saucer-shaped appearance, elevated in 

 the centre around the narrow, but completely oj)en umbilicus. The aperture is circular 

 or obovate, tig. 59. The outer lip is, when entire, thin, but thickens towards its upper- 

 most corner, where the horizontal ridge is situated. H. 11 mill., br. 13 mm. Another 

 specimen h. 7 mill., br. 9 mill. 



