90 HELICIDiE. 



quite seven, simply convex, of rather slow but regular 

 longitudinal increase, profoundly divided by a simple and 

 not much slanting suture. Body filling about two-fifths of 

 the dorsal length ; its basal declination rounded but rather 

 abrupt. Mouth unarmed, suboval, being semielHptic 

 below, and obliquely acute above, occupying barely three- 

 eighths of the ventral length, livid or reddish brown, 

 changing to white near the outer edges. Outer lip not 

 very prominent, rather narrowly reflected or expanded, 

 projecting a little at first somewhat obliquely, and without 

 much convexity, then moderately arcuated. Pillar lip 

 broadly reflected, almost perpendicular, filling at least one 

 half the length of the aperture, flanked by a conspicuous 

 umbilical chink. Ordinary length six lines and a half; 

 breadth three lines. 



The animal closely resembles that of Bulimits obscunis, 

 but is rather paler. 



This is one of our rarest and most local land shells. It 

 is found only in the southern counties of England, occur- 

 ring in limited localities, usually in wooded districts, 

 Essex, Kent, Surrey (Professor Bell finds it at Skiborne), 

 Wilts, Somerset, and Gloucestershire. 



It is abundant in many districts of Germany, France, 

 and Switzerland. 



B. oBscuRus, Miiller. 



Yellowish browu ; in shape like the last but smaller ; surface 

 not shagreened ; mouth with white lips. 



Plate CXXVIII. fig. 7. 



Tufho rvjy'uim, Da Costa, Brit. Conch, p. 90 (from List. An. Angl. pi. 2, f. 8, 

 very badlj^). 



Helia^ obscura, Gmelin, Syst. Nat. p. 3661 — Mont. Test. Brit. p. 391, pi. 22, 

 f. 5. — Maton and Rack. Trans. Linn. Sec. vol, viii. p. 212, 

 pi. 5, f. 1 1 .— Dorset Catalog, p. .^."S, pi. 1 9, f. 17 (not wo]]). — 



