HAAS: ABIDA AND CHONDRINA. 309 



conic or cylindric-conic, awl-shaped; apex yellowish, smooth, 

 papillar ; 10 slightly convex somewhat flattened whorls, rapidly 

 but regularly increasing, separated by an impressed suture, 

 the last whorl the largest, compressed but not carinate basally, 

 ascending to the aperture; aperture oblique, lunate-oval, 5- 

 toothed as follows: 1 small, oblique, deeply placed columellar, 

 visible only in an oblique view; 1 lamelliform, compressed, 

 immersed parietal; 1 tooth-like angular fold; 2 quite short 

 palatals, of nearly equal length, placed deep in the throat; 

 peristome expanded throughout, white, approaching the inner 

 margin and thus narrowing the aperture; columellar margin 

 nearly straight, the outer margin longer and arcuate. Length 

 6 to 9, diam. 2 to 2.5, height of the aperture 2, width 1.5 mm." 

 (Fagot). 



As Pilsbry could only give a copy of Westerlund 's diagnosis 

 of this species, the original diagnosis of Fagot is given here. 

 Some details are to be added, as it is by no means unexcep- 

 tionable. The angular lamella may be present only as a thin 

 deposit of callus; the parietal may be completely lacking. 

 The columellar is never lamelliform, but always a tubercle. 

 The peristome is conspicuous by its white reflection, its mar- 

 gins never united. The peristome is well thickened, but re- 

 flected only on the columellar margin ; its thickening is visible 

 in the aperture as an internal callus in old individuals. 



A typical example from the valley of the Noguera Biba- 

 gorzana at Torre de Tamurcia is figured on pi. 26, fig. 11. 



Bofill and I could compare cotypes of Pupa saltus Fagot, by 

 which it appeared that this species is merely a more slender, 

 thin-shelled, so to speak "rickety" form of aragonica, in 

 which, besides, both palatals are suppressed. A cotype was 

 illustrated in our Est. I, pi. 4, figs. 8, 9. 



In distribution, this species is restricted to a few valleys of 

 the Pyrenees. It is to be found rather abundantly in the 

 valleys of the Cinca and the Esera, is less common in the valley 

 of the Noguera Ribagorzana, and is very scarce in that of the 

 Noguera Pallaresa, so that in fact it occurs only in four val- 

 leys of the central Pyrenees, and only on the Spanish side. 



The close affinity of C. aragonica to C. avenacea farinesi is 

 unmistakable, but the constancy of its characters is so great 



