HELIX. 141 



scarcely perceptible ; foot pale slaty-grey, rather slender and 

 slightly rounded in front, thick, keeled, and obtusely pointed 

 behind. 



Shell depressed, thin, moderately glossy, semitransparent, 

 pale brownish horn-colour, with very fine, close-set, curved stri^ 

 in the line of growth ; periphery rounded ; epiderinis thinnish ; 

 whorls 4, gradually increasing ; spire slightly produced, apex 

 glossy ; suture deep ; mouth forming three-fourths of a circle ; 

 outer lip thin, inflected above and below ; umbilicus rather 

 large, deep. 



Inhabits moist woods and other damp situations, 

 among decaying leaves, under stones, and at the roots 

 and on the stalks of grass and other plants, in many 

 parts of the country from Ross-shire to the Channel 

 Islands. This is the sm^allest of our British Helices ; 

 some conchologists have considered it to be the young 

 of H. riipestris, but in addition to its being easily dis- 

 tinguishable from that species by its thinner shell, 

 finer sculpture, fewer whorls, and shallower suture, 

 its habits, as well as the localities it frequents, are 

 different. It is a shy and irritable little creature, im- 

 patient of sunlight, and it seldom ventures forth 

 except at ''dusky eve," or during dull weather after 

 rain. 



22. H. PULCHEL'LA,* MtJLLER. Pl. VIII. 



Body rather short, very slightly granulated, milk-white, with 

 a faint yellowish tint above, rather darker below ; tentacles ex- 

 tremely transparent, pale yellowish-white ; upper pair thick, 

 nearly cylindrical, bulbs nearly round, very thick, intensely black ; 

 lower tentacles very short ; foot faintly margined with white, 

 strongly truncate in front, somewhat rounded behind ; lingual 

 ribbon with 60 rows of 3 1 teeth = 1 860. 



Shell depressed, slightly convex above and below, rather solid, 



Beautiful. 



