HELIX. 411 



Limnx variegatns, Draparnaud, Tabl. Moll. 103 (1801). — Ferussac, Moquin-Tandon. 

 — BiNNEY, Terr. Moll. ii. 34, pi. 65, fij,'. 1 (1851). — Leidy, Terr. Moll. U. S. i. 

 248, pi. 1 (1851), anat. 



Color brownish, yellowish-brown, or ashy-brown, with oblong- 

 oval, uncolored spots, which 



have a longitudinal disposi- ^'"' ^'^' 



tioii ; mantle with rounded 

 spots ; head, neck, and eye- 

 peduncles blue, semi-trans- 

 parent ; tentacles white ; 



base of foot sallow-white. '"^^I^^^^PP^iIaZ 

 Body when extended cylin- 



. L.Jlamis. 



drical, elongated, terminat- ' 



ing acutely with a short but prominent keel ; upper part covered 

 with long and narrow prominent tubercles. Mantle ample, oval, 

 rounded at both ends, with numerous very fine concentrical striae. 

 Sides paler, and witliout spots. Respiratory foramen large, placed 

 near the posterior lateral margin of the mantle and cleft to the 

 edge. Generative orifice indicated by a white spot a little behind 

 the eye-peduncle of the right side. Length, when fully extended, 

 usually about seventy-five mill. ; an individual kept in confinement 

 with abundance of food attained the length of nearly one hundred 

 and twenty-five mill., and several others that of two hundred milli- 

 metres. 



An introduced species, noticed hitherto in Massachusetts at Bos- 

 ton and Cambridge ; in the cities of New York, Philadelphia, and 

 Baltimore ; in Virginia at Richmond, and at the University of Vir- 

 ginia, and at other cities. It is also found in Europe, Syria, and 

 Madeira. 



Genus HELIX, Lm. 1758. 



Body elongated, semi-cylindrical, tapering to a point posteriorly, 

 convex above, plane beneath, the whole area forming a locomotive 

 disk ; integument reticulated by furrows ; mantle simple, not ex- 

 tending beyond, and accurately fitting to the peristome of the shell, 

 into which the whole animal may retire ; head obtuse, eyes at the 

 end of long, cylindrical, retractile peduncles ; tentacles short, re- 

 tractile ; generative orifice on the side of the head, behind the right 

 eye-peduncle ; respiratory orifice in the collar, at the angle of the 

 aperture of the shell, anal orifice immediately adjoining. 



