148 



smooth, of a darker colour and rather more diverging than the 

 others ; foot with a narrow, pale grey margin, truncate in front, 

 terminating in a long and obtusely pointed tail. 



Shell conic-oblong, semitransparent, somewhat glossy, vary- 

 ing from pale brownish horn-colour to brown of different depths 

 of shade, with irregular striae in the line of growth, which are 

 intersected by fine, close-set, wavy lines, causing the surface, 

 when viewed through a lens, to appear shagreened ; periphery 

 rounded (keeled in immature specimens) ; epidermis thickish ; 

 whorls 6J-- 7f , rather compressed, body whorl occupying some- 

 what less than half the length of the shell ; spire tapering, apex 

 obtuse ; suture rather shallow and oblique ; mouth forming 

 three-fourths of an oval, pinkish or brown inside ; outer lip 

 whitish, rather thick, reflected, especially over the umbilicus, 

 which is narrow, but moderately deep. 



Inhabits woods in some of the southern and western 

 counties of England, on the trunks and among the 

 fallen leaves of trees, especially those of the beech, 

 but it is a very local species. It occurs with H. 

 obvoluta in woods near Buriton in Hampshire, and has 

 also been found near Godalming by Mr. H. W. Kidd, 

 and near Henley-on-Thames by Mr. Rich. It is 

 rather inactive and irritable, and secretes an abundance 

 of watery slime. In spring this snail, like some of the 

 Clausiliae and a few other members of the Helicidse, 

 ascends trees (especially the beech) to a considerable 

 height ; it should consequently be searched for in 

 early spring before it has made its ascent, or in 

 autumn when it descends to seek its winter quarters. 



3. B. OBSCU'RUS,* MULLER. PL. VIII. 



Body thickish, oblong, pale brown or reddish above, darker 

 underneath, tubercles small, rather wide apart ; tentacles very 

 slightly conical, brown, upper pair finely granulated, bulbs 



Hidden. 



