PUPILLA, EUROPE. 177 



minute, rirnate-perforate, obese-ventricose, rather solid, quite 

 opaque, corneous, under the lens very sharply striatulate; 

 spire obese, obtusely tapering, at the apex paler. Whorls G 1 /^, 

 a little convex, regularly and slowly increasing, separated by 

 .a strongly impressed suture, the last whorl one-third the alti- 

 tude, regularly ascending, at the base a little compressed, at 

 the aperture constricted-subplanulate behind the external lip 

 of the peristome. Aperture small, a little oblique, lunate- 

 coarctate, biplicate ; one parietal fold, very minute and 

 deeply placed, the other fold palatal, stronger, white and im- 

 mersed ; peristome lightly thickened within, subacute, some- 

 what expanded at the base and columella, externally having a 

 whitish, roughened lip ; margins joined by a thin callus. Alt. 

 3, diain. 2 mm. Under stones at the entrance of the Valette 

 near Montpellier (Paladilhe). 



Mut. glis Westerlund). PL 20, fig. 20. Perforate-rimate, 

 -ovate-cylindric, densely striatulate, rufescent; whorls 6Vo, a 

 little convex, separated by a little impressed, margined suture, 

 slowly increasing, the last ascending, at the aperture de- 

 scending, anteriorly with a widely diffused white callus, sep- 

 arated from the lip by a groove. Aperture semicircular, mar- 

 gins distant, strongly lipped within, having a high, long 

 parietal lamella, and within the palate behind the outer 

 margin two strong, granule-like teeth. Length 3, diam. 1% 

 mm. 



England: Yorkshire (J. Ponsonby) ; Brandon, Suffolk 

 (Chester, Mayfield). 



Pupa (Pupilla) muscorum Lin. var. glis WESTERLUND, 

 Nachrbl. D. Malak. Ges., Aug. 1893, p. I20.Jaminia tripli- 

 cata Studer CHASTER, Journ. of Conch., xi, p. 319 (Brandon, 

 Suffolk, England) ; cf. DEAN and TOMLIN, Journ. of Conch., 

 xv, 1917, p. 165, fig. 2. 



Dean and Tornlin have shown that the English form is a 

 form of muscorum, lighter in color than typical, with more 

 solid shell; "some are bidentate, while others have in addi- 

 tion a deep-seated callosity on the columella, difficult to see 

 from any point of view. ' ' It seems to be what Jeffreys called 

 var. tridentata. 



