32 CHONDRINM: OF THE PYRENEAN CENTER. 



tinuous with the spiral. Des Moulins' figure is copied in pi. 2, 

 fig. 5. The name was altered by Fagot on the ground that 

 "sesquipedalia verba excludenda sunt" as specific names a 

 salutary but obsolete Linnean regulation. 



Var. clongatissima (Des Moulins). PI. 2, fig. 6. Remark- 

 able for its elongation, the fusiform appearance, the narrow- 

 ness of the umbilicus (consequent upon the elongation), and 

 by the smallness of the \vhorls of the point, characters which 

 make it resemble a Clausilia. The shell, more transparent 

 than that of Italy [megacheilos], is more solid than in the 

 following varieties [tenuimarginata, bigorriensis]. The peri- 

 stome thickened and reflected almost as flatly as in that of 

 Italy, presents the same variations as to the inferior angle of 

 the aperture. The size of aperture is equal to that of var. a 

 [megacheilos], which results in a different proportion which 

 is very characteristic of the variety ; 9-10 whorls. Length 12- 

 13 mm., diam. 3y 2 -4 mm. Pyrenees. The celebrated ento- 

 mologist and lichenologist M. Leon Dufour gave four speci- 

 mens to M. de Grateloup, but the precise locality is unknown 

 to me (Pupa megacheilos var. b (elongatissima), Des Moulins, 

 Actes Soc. Linn. Bord., vii, 1835, p. 162, pi. 2, f. si, e2). 



Moquin-Taiidon has recorded this variety from back of 

 Gavamie on the Spanish side of the boundary; perhaps he 

 intended the following form. 



11, CHONDRINA GIGANTEA ('Moq.' Rossm.). PI. 3, figs. 7, 8. 



Its color is light corneous-brown ; while very finely striate, 

 it is much more decidedly so than P. megacheilos Jan. The 

 umbilical orifice, narrow but very distinctly developed in 

 megacheilos, is only w r eakly indicated ; the back of the neck is 

 less strongly compressed, and the aperture therefore less an- 

 gular below. It is especially remarkable that the two middle 

 palatal folds become weaker inwards, as usual, while in mega- 

 cheilos they always begin there with a tubercle. The lip of 

 the less expanded peristome is weaker and not so broad and 

 flat as in the other species (Rossm.). 



Cirque de Gavarnie, on the Spanish border, beyond the 

 Pont de Neige (Partiot). 



