80 



TRUNCATELLINA. 



immersed, the columella with a tooth-like callus. Peristome 

 simple, a little expanded, margins separated. Length % to 

 %, width scarcely % line [about 1. 1.25 to 1.56, d. 0.5 mm.] 

 (Gredler). 



Var. (modus. Without tooth ; occurs with the typical form 

 (Gredler). 



Southern Europe, from France to Dalmatia; originally 

 found in the Austrian Tyrol near Salegg at the foot of the 

 Schlern and gorge of the Sarn valley. 



Pupa claustralis GREDLER, Verh. zool.-bot. Vereins in Wien, 

 vi, 1856, p. 116, pi. 2, f. 1. PPR., Monogr., iv, 678. WESTER- 

 LUND, Malak. BL, xxii, p. 126; Fauna, 1887, p. 127 BOETT- 

 GER, NachrbL, xi, 1879, p. 67 (distribution in France, etc.). 

 Pupa (Isthmia) claustralis KOBELT, Iconographie, (2), viii, p. 

 84, pi. 234, f. 1515. WEISS, Nbl. d. Mai. Ges., 1894, p. 156 

 (Pleistocene, Weimar-Taubach). 



Distinguished by the strong teeth, the palatal fold deeply 

 immersed, concealed behind the columella in a direct face 

 view. Variable in size among the specimens at hand. 



Length 1.7, diam. 0.8 mm. 



Length 1.55 mm. 



Boettger considers P. clavella Reinh. scarcely varietally dis- 

 tinct from claustralis Gredl. ; the supposed difference of con- 

 tour noted by Keinhardt is not distinctive. P. opisthodon 

 Reinh., too, Boettger held, is at most not more than varietally 

 distinct, and cannot possibly be distinguished specifically by 

 the stronger columellar tooth. Like strobeli and "minutis- 

 sima," P. claustralis has a certain variability with locality, 

 and as in most small Pupae, a very wide distribution ( Jahrb. 

 d. Mai. Ges., x, 184). 



14a. T. claustralis salurnensis (Reinh). PL 11, figs. 6a-d. 



Shell dextral, minute, fusiform, subperforate, glossy, cor- 

 neous, under the lens slightly striate. Whorls 6y 2 , convex, 

 the first rapidly increasing, third and fourth subequal, the 

 rest slowly decreasing; last whorl tapering, slightly ascending 

 in front ; suture deep. Aperture rounded, vertical, 3-plicate : 

 an entering lamelliform parietal fold, another strong one 



