CHONDRIN^E OF THE ALPIC CENTER. 23 



Rosciano and Ponteranica, on walls and limestone cliffs 

 (Charpentier) ; Bergamasker Alps as far as Lake Garda 

 (Kobelt). 



Pupa bergomemis Charpentier MS., KUESTER, Conchyl. 

 Cab., p. 114, pi. 15, f. 14-16. PFR., Monogr., iii, 548. WES- 

 TERLUND, Fauna, 1887, p. 99. KOBELT, Iconogr. n. F., ix, 

 1902, p. 70, f. 1696. 



It is distinguished from all its relatives (megachettos, avena 

 and secale) by its more slender shape, grayish horn-color, 

 smaller size, and entire lack of gloss ; but chiefly also by the 

 rib-striae, and by the very regularly and gradually increasing 

 whorls (Charp. in Kuester). 



The angular lamella is usually separated from the spiral, 

 but sometimes they are weakly connected. There is no supra- 

 palatal plica. The upper palatal reaches the peristome, the 

 lower scarcely, and the basal is decidedly shorter. The base is 

 rounded, though the last whorl is distinctly compressed later- 

 ally. Lip is thin and somewhat expanded throughout. Stria- 

 tion is fine, close and regular. Length 6, diam. to edge of lip 

 2.4 mm. 



Var. lepida West. Shell longer, the last whorl wider and 

 higher, the outer margin of aperture more strongly angular 

 above, columellar margin strongly converging at the insertion ; 

 length 6%, diam. 2% mm. Lago di Garda. (Westerlund, 

 Fauna Europaea, etc., 1878, p. 173.) 



8. CHONDRINA SPELTA (Beck). Vol. 24, pi. 48, figs. 6, 9. 



Shell more conic than the typical form [of avenacea] , um- 

 bilical crevice larger, whorls more convex, the suture therefore 

 deeper, the last whorl almost globular ; neck not compressed at 

 base ; lower columellar fold usually rather degenerate ; always 

 two folds in the palate; aperture somewhat more rounded; 

 length 2, diam. 1 line, 7 whorls; in all other characters like 

 the type. Dalmatia (Rossm., P. avena var. minor) . 



Shell with a narrow but penetrating umbilicus, ovate-conic, 

 obtuse, from reddish-brown to brownish purple-red, frequently 

 one of the whorls pale red, from the light-colored body show- 

 ing through. The surface is closely rib-striate, almost luster- 



