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412 Binney’s Monograph of the Helices 
32. HELIX LIGERA. 
Plate XX. fig. 1. 
H. testà su b-globosa, perforata, nitidà, cornea ; anfractib us septem, 
obliqué striatis; apertura lunato-rotundatá ; labro simplici, acuto; basi 
prope — ram albo, interné incrassato. 
- SYNONYMS AND REFERENCES. 
Helix ligèra; Say. Journ. A. N. S. Philad., IL. 157. 
Helix Rafinésquea, Férussac. Hist. Nat. des Moll, 
Flin XA AME PRR e 
Helix Wardiana,? Lea. Trans. Am. Phil. Soc., 
= N.S, VL 67. Pl. xxm. figs [ 
DESCRIPTION. 
idikas ‘Uniform blackish intente over the 
whole upper surface, paler on the posterior extremity 
and base ; collar grayish-white ; foot narrow; exceed- 
ing in length twice the tranverse diameter £i the 
shell. 
Shell. Sub-globose, epidermis veiam horn- 
color, shining ;. whorls seven, finely and thickly - 
striated transversely ; suture not much impressed ; 
aperture semilunate, rounded ; lip thin, acute ; base 
and side of the outer whorl. within the «aperture 
thickened, and white ;.wmbilicus very minute, nearly 
closed ; umbilical region impressed. 
Greate transverse diameter five eighths of an 
inch, usually much less. 
,QEOGRAPHICAL DISTRIBUTION. Inhabits all the 
Western States, where it is commi has been 
noticed also in the Sortie T 
