CHONDRIN/E OF THE PYRENEAN CENTER. 47 



no satisfactory evidence that farinesii occurs anywhere east of 

 the Rhone. It has been reported from the Apuan Alps of 

 Tuscany, but while I have not seen specimens, I am disposed 

 to think them terminal members of a parallel and independent 

 evolution-series from the avenacea stock. See under oligo- 

 donta. 



Of the several varieties described, the first three appear to 

 occur with the typical form, and seem to be merely mutations. 



Var. obesa Bgt. Shell shorter, more obese than the type. 

 San- Julia de Loria, Andorra. 



Var. subcarinata Bgt. Shell a little more lengthened than 

 the type, with an obsolete carina at the base, which makes the 

 aperture larger. San-Julia de Loria. 



Var. dentiens Moq.-Tand. PI. 5, fig. 4. The angular lamella 

 present as a whitish deposit, diffuse or in form of a little tooth, 

 and a low prominence may usually be seen on the columella. 

 La Preste. 



Var. biplicata Bgt. Shell of a little smaller size, having 

 only one tooth on the columella instead of two as in the type 

 [of jumillensis]. Rocks of San-Julia de Loria ; also valleys of 

 Ussat and Vic-Dessos (Ariege). (Pupa jumillensis var. bipli- 

 cata Bourguignat, Moll, de San-Julia de Loria, 1863, p. 18, pi. 

 2, f. 10-12.) It differs from var. dentiens by having a low 

 columellar lamella as well as an angular. See p. 50. 



Var. ascendens West. Shell widely perforate; whorls iy 2 , 

 the ascent of the last high and long, rounded at base. Aper- 

 ture with the base narrower, two-folded ; outer margin angu- 

 larly curved above. Length 6, diam. 3 mm. St. Beat, Pyre- 

 nees. (Pupa jumillensis var. ascendens Westerlund, Fauna 

 Europaea Moll. Extramar. Prodr., fasc. ii, 1878, p. 179.) 



PUPA SPELUNCAE ('Bgt.,' Loc.). Cylindric-elongate, feebly 

 tapering; 9-10 slightly convex whorls, the last a little larger, 

 suture moderate ; rimation quite strongly developed ; aperture 

 subrectangular, a little excentric ; peristorne thin, sharp, with- 

 out external crest; shell quite solid, slightly glossy, deep 

 brown, ornamented with fine, crowded Avrinkles. Length 8, 

 diam. 3 mm. Entrance of the grotto of Eaux-Chaudes (Basses- 

 Pyrenees). (Pupa spelunca; Bourguignat in coll., Locard, 

 Ann. Soc. d'Agric. Lyon, (7), iii, 1896, p. 185.) 



