<., 



476 



Binney^s Monograph of the Helices 



Helix albolabrisj Fcrussac. Hist. Nat. des Moll. PI 



XLiii, Jig. 1 to 3. 

 Cochlea Virginiana^ Lister. Synops. method. Conch 



tab. 41, Jig. 45. 



Description. 



Animal. Varying from pure white to cream color, 

 with sometimes a greyish hue ; upper part of head and 

 neck slightly brownish ; extremities of tentaculse smoky ; 

 eyes black. Superior tentacular more than half an inch 

 in length w^hen fully extended, slender, and cylindrical ; 

 foot with a slightly expanded margin, terminating poste- 

 riorly in an acute angle. Glandular tubercles very dis- 

 tinct and prominent, on the back arranged longitudinally, 

 on the tentaculae long and narrow. Dental edge of the 

 upper jaw saffron color. Extreme length about two 

 inches and a half* 



Shell. Convex ; epidermis, immaculate, of a uniform 

 yellowish brown or russet color ; ivhorls, betw^een five 

 and six, wnth fine parallel striae running obliquely across 

 them, and spirally striated with very minute, delicate lines, 

 which are most apparent on th^ back of the reflected lip ; 

 suture, w^ell marked and distinct ; aperture, contracted by 

 the lip ; lip^ white, flattened in the plane of the mouth, 

 abruptly and widely reflected ; umbilicus of the mature 

 shell, covered by the reflected lip, which is continued to 

 the base of the shell. 



Greatest transverse diameter rather more than one inch. 



Geographical distribution. This species has been 



noticed on the 



M 



Bluffs, and In the Northwestern Territory. It is also found 

 in nearly all the States intervening from Canada to South 



