TRUNCATELLINA. 79 



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

 mersed, dorsal, not visible in a front view. Peristorne ex- 

 panded, 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*4 whorls. 



Sweden, Denmark, northern Germany. Transcaucasus, 

 Talysch region (Westerlund). 



Pupa costulata NILSSON, Hist. Molluscorum Sveciae, 1822, 

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

 mida).--KuESTER, Conchyl. Cab., p. 101, pi. 13, f. 29, 30.- 

 PFR., Monogr., ii, 313; Malak. Bl., xxiii, 1876, p. 211 (nomen- 

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

 vegiaa et Danise, 1873, p. 246; Fauna, iii, 1887, p. 127, with 

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

 Malak. Bl., xiv, 1867, p. 201 (Oeland, very abundant). Pupa 

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

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

 costulata Nilss., STEENBERG, Danmarks Fauna, Landsnegle, 

 1911, p. 170, f. 140. 



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

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

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



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

 colored crest behind the lip and the heavy white lip-callus 

 within. 



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

 convex whorls, cylindric with very deep suture, the last 

 scarcely ascending, but little wider than the preceding, 

 towards the back slowly, arcuately tapering; peristome 

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

 Alt-Geltow near Potsdam, Jetschin (Westerlund). 



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

 The shell is subperforate, cylindric or fusiform-cylindroid, 

 obtuse, regularly and closely costulate-striate, silky, pellucid, 

 flesh-colored. Whorls 6 to 6y 2 , convex, the last tapering 

 towards the aperture. Aperture narrow, semioval, biplicate: 

 a distinct parietal fold, the other palatal, lamelliforrn, deeply 



