36 CHONDRIN/E OF THE PYRENEAN CENTER. 



\ 



little reflected. Shell wine-brown, ornamented with quite 

 spaced lamellar stria?. Length 7, diam. 3 mm. Plateau de 

 Lourdes, vallee du Gave d'Osson (Hautes-Pyrenees). (Pupa 

 centralis, Fagot, Hist, malacol. des Pyrenees Francaises et 

 Espagnoles, Bull. Soc. Ramond, 1891, xxvi, not seen; desc. 

 from Locard, Ann. Soc. d'Agric. Lyon, (7), iii, 1896, p. 188.) 



17. CHONDRINA DERTOSENSIS (Bofill). Shell perforate-sub- 

 rimate, ovate-subconoid, obtusely tapering at the apex, cor- 

 neous-reddish, a little glossy, obliquely striatulate; 7-8 convex 

 whorls, regularly increasing, separated by an impressed 

 suture, smooth at the apex; the last whorl a little swollen, a 

 little compressed at the rimation, slightly ascending to the 

 aperture. Aperture subvertical, semiovate-rounded, plicate as 

 follows : An angular fold at the insertion, another rather 

 prominent, immersed parietal in the middle ; 2 on the colu- 

 mellar lip, the lower one smaller; 2 or 3 palatals (in adults), 

 the upper one stronger, reaching the lip, the others shorter, a 

 little immersed ; peristome unexpanded, acute, with a tawny 

 lip within, the margins strongly approaching, the outer curved 

 above, columellar slightly reflected. Length 6, diam. 2, aper- 

 ture 2-x 1% mm. (Pupa dertoscnsia Bofill, Bull. Soc. Malac. 

 France, iii,' 1886, p. 162). 



Spain : rocks at the peak of the Serra de Cardo, Tortosa 

 Catalonia). 



This form has been placed by Westerlund in the avenaceo 

 group, by Caziot in the farinesii group near pulchella. 



18. CHONDRINA CRASSATA ('Bofill', Fagot). Shell nearly 

 covered rimate, almost cylindrical, rather rapidly tapering at 

 the summit, corneous-violaceous or rufescent, nearly smooth. 

 Whorls 9, rapidly regular, the last compressed basally, broadly 

 crested, descending at the aperture. Aperture produced to 

 the left, ovate, with 2 parietal, 2 columellar and 4 palatal 

 folds. Columellar lamella? nearly equal ; first palatal puncti- 

 form, the rest subequal, not emerging; peristome expanded 

 throughout, strongly thickened, porcellanous, the columellar 

 margin oblique, straight, outer margin arcuate. Length 10, 

 diam. 2i/ 2 mm. Spain. (Pupa crassata Bofill, in Fagot, Cro- 

 nica Cientifica, 1888, not seen ; desc. from Westerlund, Synop- 

 sis, 1897, p. 96.) 



19. CHONDRINA SCHISTA (West.). Shell deeply perforate, 

 cylindric-conic, cherry-brown, rarely reddish-corneous, smooth 

 (sometimes, under strong magnification, very irregularly stri- 



