CHONDRIN/E OF THE ALPIC CENTER. 21 



Alpes-Maritimes : gorges of the Cians, at about 1200 meters 

 elevation, nearer to Beuil than Rigaut, living on Permian 

 rocks in very numerous colonies, on the right bank of the 

 torrent. 



Pupa cianensis CAZIOT, Etude Moll. Monaco et Dep. Alpes- 

 Maritimes, 1910, p. 318, pi. 9, f. 16. 



P. cianensis differs from pallida by the coloration, the slower 

 increase of the whorls, the deeper suture, stronger, coarser 

 and more irregular striation ; the more lengthened last whorl, 

 which is less convex, and the longer aperture. Pupa cianensis 

 does not belong to the group of pallida, but to that of mega 

 cheilos and avenacea. In the Alpic center it takes the role of 

 farinesii in the Hispanic (Cazwt). 



It lives in a much colder zone than pallida, in gorges shaded 

 from the rays of the sun except for short periods. Just what 

 relation it holds to C. oligodonta of the Apuan Alps has not 

 been touched upon by Ct. Caziot. 



5. CHONDRINA CEREANA ('Muhlf.' Kiister). PI. 1, fig. 11. 



Shell subperforate, cylindric-subfusiform, lightly wrinkle- 

 striate, glossy, purplish-brown ; spire turrited, rather acute ; 8 

 slightly convex whorls, the last somewhat compressed at the 

 base. Aperture oblong, brown, 8-plicate within : angular and 

 parietal folds deeply placed, of moderate size ; 2 columellars, 

 the lower dentiform ; 4 palatal plica?, the upper one minute or 

 obsolete, the rest subequal, nearly reaching the margin ; peri- 

 stome simple, narrowly expanded, the margins converging. 

 Length 7, diam 2f mm.; aperture 2 mm. long, If wide (P/r.). 



Southern Germany and France (Kuester) ; Carinthia, south- 

 ern France, northern Spain (Westeiiund). 



Pupa cereana Miihlfeldt in coll., KUESTER, Conchyl. Cab., 

 1845, p. 47, pi. 6, f. 9-11. PFR., Monogr., ii, 348. WESTER- 

 LUND, Fauna, iii, 1887, p. 99. Modicella cereana Ch., Kiist., 

 WESTERL., Synopsis, p. 98. 



With the appearance of P. avenacea, it agrees more with P. 

 megacheilos in structure of the plicas (Pfr.). The distribu- 

 tion given by Westerlund does not appear plausible. 



