C^GCILIOIDES OF CENTRAL EUROPE. 15 



e (luv. della Sicilia, 1881, p. 89; figured in Illustr., etc., pi. 8, 

 f. 7. 



Var. cristallina (Benoit). Shell turrite, whitish, smooth, 

 translucent, the apex obtuse, spire composed of 5 slightly convex 

 whorls separated by a well-marked suture. Last two whorls 

 forming two-thirds the total length. Lip simple, acute, the 

 margins joined by a callus. Aperture piriform; truncation of 

 the coluniella strongly marked. Length 5, diam. 2 mm. 

 Sicily : Spadafora, near Messina. (Csf-ril. cristnUind BEN., 

 Catalogo, 1881, p. 90). Related to C. gemmelhtriami. 



Var. hyalina (E. A. Bielz) PI. 1, tigs. 3, 4. The shell is 

 very long and narrow, composed of fully 6 very slightly convex 

 whorls, the last 4 rapidly increasing, the suture very oblique, 

 but descending much less rapidly near the aperture. Aperture 

 small, piriform. Columellar callus rather thin, but in certain 

 positions its upper edge is barely visible as a slight prominence 

 on the parietal wall. Length 5, diam. 1.25, aperture 1.7 mm. 



Transsylvania: Hermannstadt, in a garden; Mediasch; 

 Schlossberge von Vajda Hunyad (Bielz). 



Acicula hyalina BIELZ, Fauna der Land und Susswasser-Mol- 

 lusken Siebenburgens, 1863, p. 84; Second edit., 1867, p. 89 

 (exclusive of synonymy). 



Bielz intended his name to replace that of acicula, but he 

 gave a description of the Transsylvanian form, which proves to 

 be distinct from ancula by its greater elongation. It stands 

 close to Uesvillel, but is possibly separable by the more delicate 

 columellar callus and the absence of a distinct callus on the 

 parietal wall. The specimen figured was received from Bielz. 



Var. uni.plimta Bourguignat. PI. 1, figs. 13, 14. Shell 

 minute, turrite-oblong, slender, very fragile, diaphanous- 

 whitish, crystalline, smooth; apex obtuse, mamillate, composed 

 of 6 nearly flat or slightly convex whorls, which increase 

 rapidly and unevenly, and are parted by an impressed, not 

 duplicated, suture; the last whorl half the total length or more. 

 Aperture piriform-oblong; columella uniplicate above, a little 

 twisted, truncate at the base; peristome acute, unexpanded, 

 simple, the right margin arching forward, columellar margin 

 somewhat calloused. Spreading, the margins joined by a thin 

 whitish callus. Length 4, diam. 1.25 mm. (Brit.). 



