PUPILLA, ASIA. 197 



two palatals, the lower corresponding to the external sulcus, 

 the upper smaller. Length 3, diam. 1.5, aperture 1 mm. alt. 

 and width (Reinh.). 



Transcaucasus : Borschom, on the upper Kur, 0. Schneider. 



P. [upa] interrupta REINH., Jahrb. D. Malak. Ges., iii, p. 

 367; iv, 1877, p. 79, pi. 3, f. 4. Pupa (Pupttla) interrupta 

 BOETTGER, Jahrb., vi, 1879, p. 403; vii, 137, Tiflis, with f. 

 albina. 



21. PUPILLA POLTAVICA Bttg. PI. 21, figs. 9, 10. 



Shell of the size of P. triplicata (Stud.), perforate, cylin- 

 dric-ovate, short, wide. Spire convexly conic, the apex a 

 little acute. "Whorls 5%, slowly increasing, convex, separated 

 by a well-impressed suture, regularly and closely costulate- 

 striate, the last very slightly ascending, somewhat compressed 

 at the base, encircled by a distinct but narrow anteperistomial 

 callus. Aperture irregularly ovate, wider than high, the base 

 receding. A small angular fold within the right margin, 

 scarcely separated from the punctiform parietal, otherwise 

 toothless. Peristome narrowly expanded, slightly thickened 

 within. Length 2%, diam. in the middle 1%, alt. aperture %, 

 width 1 mm. (Bttg.). 



Russia: Middle Pleistocene marl-clay of Kamenka, Circle 

 of Poltawa, very rare, with typical P. muscorum (Prof. Do- 

 kutschajew). 



Pupttla- poltavica BOETTGER, Jahrb. Nassau. Ver. Naturk., 

 42, 1889, p. 262, pi. 6, f. 7. 



On account of the peculiar structure and position of the 

 angular and parietal lamellse, both brought forward and situ- 

 ated near the right angle of the aperture, this form cannot be 

 brought into close relation with any of the known living or 

 fossil species of the genus ; but P. interrupta Reinh. of Trans- 

 Caucasus affords an analogy, inasmuch as in it also the an- 

 terior part of the parietal lamella can be interpreted as an 

 angular. The palatal teeth and columellar tooth of the Trans- 

 caucasian species are wanting in the south Russian loess form 

 here described (Boettger). 



