ORCULA. 13 



Hitherto no form of dolium has been found on the Balkan 

 Peninsula, and this is so different from the type that one 

 feels impelled to consider it a distinct species. It differs by 

 its thick, entirely cylindric form (in dolium at least 5 upper 

 whorls form a lengthened cone, or the whole spire is almost 

 conic) ; by the more slowly increasing whorls, quite trans- 

 versely placed, with horizontal suture, giving the shell a 

 peculiar appearance, and by the small aperture with quite 

 straight, simple lip, etc. (West.). 



2. Orcula gularis (Rossm.). PI. 1, fig. 14. 



The shell is minutely perforate, deeply rimate, cylindric, 

 passing at the upper third into a convexly conic summit; 

 chestnut brown, glossy, weakly, irregularly striate. Whorls 

 slightly convex, the last slightly swollen and cream-white be- 

 hind the lip, ascending a little to the aperture. Aperture 

 truncate-oval, the peristome thin, very little expanded, pale 

 brownish. Parietal lamella thin but high, emerging nearly 

 to the edge of the thin parietal callus, and entering to the 

 ventral side. Columellar lamella rather strong, not emerging 

 to the lip ; above it a smaller, more deeply placed supra- 

 columellar lamella, visible only in an oblique view in the 

 aperture, or sometimes wholly immersed. A short distance 

 within the outer and basal margins there is a strong ivhite 

 callus, inwardly running into an entering lower-palatal fold, 

 strong or weak. 



Length 6.5, diam. 2.6 mm. ; 9 whorls. 



Mountains of Carinthia, Carniola, southern Tirol, Steier- 

 mark; type locality on the Loibl, in Carinthia, at about 3000 

 ft,, on limestone blocks in turf of alpine plants, chiefly Globu 

 laria cordifolkv (Rossmaessler). 



Pupa gularis Rossmaessler, Iconographie, i, pt. 5, 1837, p. 

 17, pi. 23, f . 333 ; with var. spoliata Rm., p. 18, pi. 23, f . 334. 

 — Pfr., Monogr., ii, 326; viii, 368. — Kuester, Ber. nat. Ges. 

 Bamberg, x, 1875, p. 58. — Reinhardt, Jahrb. d. m. Ges., 1877, 

 p. 282, footnote (armature of young) ; Sitzungsber. Ges. 

 naturf. Freunde, Berlin, 1880; p. 20 (distribution). — Orcula 

 gularis Rossm., Tschapeck, Nachrbl. d. m. Ges., xix, 1887, p. 



