TRUNCATELLINA. 



79 



imella immersed, low and wide. Palatal fold strong, im- 

 lersed, dorsal, not visible in a front view. Peristome ex- 



inded, thickened within with a heavy, wide white callus. 



Length 1.95, diam. 1 mm. ; 6*4 whorls. 



Length 1.85, diam. 0.9 mm. ; 6% whorls. 



Sweden, Denmark, northern Germany. Transcaucasus, 

 'alysch region (Westerlund). 



Pupa costulata NILSSON, Hist. Molluscorum Sveciae, 1822, 

 . 51 (Esperod, Scaniae, in sylvis, inter folia putrida, hu- 



ida). KUESTER, Conchyl. Cab., p. 101, pi. 13, f. 29, 30. 

 >FR., Monogr., ii, 313 ; Malak. BL, xxiii, 1876, p. 211 (nomen- 

 clature). WESTERLUND, Fauna Moll. terr. fluv. Sveciae, Nor- 

 vegiae et Daniae, 1873, p. 246 ; Fauna, iii, 1887, p. 127, with 



ir. allogyra, p. 128. Vertigo costulata Nilss., WESTERLUND, 

 [alak. BL, xiv, 1867, p. 201 (Oeland, very abundant). Pupa 

 'Isthmia) costulata Nilss., BOETTGER, Jahrb. d. M. Ges., vi, p. 

 )5; Bericht Senck. Ges., 1889, p. 25 (Caucasus). Isthmia 

 istulcita Nilss., STEENBERG, Danmarks Fauna, Landsnegle, 

 L911, p. 170, f. 140. 



Pupa ascaniensis A. SCHMIDT, Zeitsch. f. Malak., 1849, p. 

 L41 (Ascherleben and Halberstadt). KUESTER, Conchyl. Cab., 

 ). 179, pi. 21, f. 15, 16. PFR., Monogr., iii, 554. 



This species is easily recognized by the wide, rounded, light- 

 )lored crest behind the lip and the heavy white lip-callus 

 ithin. 



Var. aUogyra West. Smaller, wider above; only 5 strongly 



ivex whorls, cylindric with very deep suture, the last 

 ;arcely ascending, but little wider than the preceding, 

 >wards the back slowly, arcuately tapering; peristome 

 trongly expanding, with a very thick lip within. Germany : 



It-Geltow near Potsdam, Jetschin (Westerlund). 



L4. TRUNCATELLINA CLAUSTRALIS (Gredler). PI. 11, figs. 1, 2. 

 The shell is subperforate, cylindric or fusiform-cylindroid, 

 )btuse, regularly and closely costulate-striate, silky, pellucid, 

 i-colored. Whorls 6 to 6^2, convex, the last tapering 

 wards the aperture. Aperture narrow, semioval, biplicate : 

 distinct parietal fold, the other palatal, lamelliform, deeply 



