310 ABIDA. 



bling the type, but with, 4 superior folds, 2 columellars and 4 

 palatals; "resembles the preceding variety, differing only by 

 a little fold, very thin and long, which follows the upper 

 angle of the columella. This variety imitates P. boileausiana 

 Charp. ' ' Environs of Aix-les-Bains, and in drift of the Rhone 

 (Locard, Variations Malac., 1880, p. 259). 



Var. oyonnaxia Locard. Shell resembling the type, but 

 with 10 folds disposed thus : 3 superior, the little fold of the 

 upper angle of the outer lip often not very distinct, 3 colu- 

 mellar folds, and 4 palatal folds; the third columellar fold is 

 very low down and emerges but little, it is very distinct in 

 some specimens; rare. Oyonnax (Ain). Loc., Var. Mai., 

 1880, p. 259. 



Var. bourgetica Bourguignat. Aperture 11-plicate, 4 folds 

 on the parietal wall, 3 columellar and 4 palatal. This variety 

 is distinguished from the preceding [var. dec-emplicata] in 

 that the columella instead of having 2 lamelliform folds pre- 

 sents besides a third punctiform fold at the base. Aix-les- 

 Bains (Savoie). Pupa secale var. bourgetica BGT., Malac. 

 d'Aix-les'-Bains, 1864, pp. 49, 50, pi. 2, f. 1. LETOURNEAUX, 

 Moll. Lamalou, p. 64. 



Var. sublaevigata Bourguignat MS., Locard. Has the same 

 characters as the preceding, except that the shell is nearly 

 smooth and under the lens does not show the fine, oblique, 

 crowded striae which characterize the type. Dent-du-Chat, 

 in Savoie. Locard, Var. Malac., 1880, p. 260. 



Var. duodecimcostata Locard. The shell conforms to the 

 type but is a little larger, ornamented with 12 folds disposed 

 thus : 4 superior, 2 columellar, the upper strongly developed, 

 6 palatals, the upper deeply immersed, the second and fourth 

 very prominent, the other three reduced to punctiform folds, 

 little immersed. Environs of Lyons and Vernet, coll. of M. 

 Gabillot. Locard, Var. Malac., 1880, p. 260. 



Var. edentula Taylor. Shell smaller, thinner, smooth and 

 glossy ; striation regular, and fine on the upper whorls, grad- 

 ually becoming fainter and more irregular on the lower ones ; 

 apertural plications obsolete. This variety was found by me 

 in September, 1877, at the foot of the rocks near Ingleton in 

 Yorkshire. The specimens of the type found in company with 

 it partake of many of the peculiarities enumerated. It fur- 

 nishes an approach to the continental species, Pupa avena 

 (Taylor, Journal of Conchology, 1879, p. 5). 



Var. oryza.no, Locard. Ovoid, somewhat slender, of 7-8 

 quite convex whorls ; 3 superior folds, the first two contiguous, 

 lodged near the suture, third immersed; 3 columellars, the 



