HELIX. 223 



relle des Mollusques terrestres et fluviatiles de la France ' 

 was edited by his widow and appeared in 1805. Studer 

 first gave this species the name of "rupestris " in Coxe's 

 'Travels through Switzerland' (1789), but did not de- 

 scribe it. 



21. H. PYGM^E'A*, Draparnaud. 



H. pygmcea, Drap. Tabl. p. 93, and Hist. p. 114, pi. viii. f. 8-10; 

 F. & H. iv. p. 83, pi. cxxi. f. 9, 10. 



BODY greyish-brown or slate-colour, minutely speckled 

 with black ; tubercles round and much depressed : mantle 

 brown, with a slight tinge of red : tentacles rather close to- 

 gether, nearly cylindrical, abruptly thickened at their base ; 

 bulbs indistinct : foot narrow and ending in a thick and 

 keeled tail. 



SHELL nearly circular, depressed above and below, thin, 

 semitransparent, rather glossy and having a silky lustre, 

 light-brown or tawny, marked transversely with extremely 

 fine and close-set curved striae and spirally (especially round 

 the umbilicus) with a few delicate lines, which are only 

 perceptible with a high magnifier : periphery rounded and 

 not keeled : epidermis rather thin : whorls 4, convex and 

 cylindrical, gradually increasing in size : spire not much 

 raised; summit glossy and transparent : suture deep : mouth 

 shaped as in H. rupestris and not margined : outer lip thin, 

 somewhat inflected on both sides : umbilicus moderately 

 large, but deep and fully exposing the interior of the spire, 

 as well as part of the penultimate whorl. L. 0'03. B. 0*06. 



HABITAT : Woods and moist places under stones and 

 among dead leaves, as well as at the roots of grass and 

 rushes, from Oban to Guernsey. It is widely diffused, 

 although difficult to find on account of its minute size. 

 Saint-Simon seems to have been successful in taking it 

 several times and in considerable numbers by sweeping 

 the wet grass and herbage after rain with an entomolo- 

 gists' gauze net ; and Dr. Turton told me that he pro- 



* Tiny. 



