FAMILY HELICIDZ — HELIX. 37 
HELIX FULIGINOSA. 
PLATE Ill. FIG. 22. 
Hi. fuliginosa, GRirritH. Apams, Am. Jour. Sc. Vol. 40, p. 273. 
Description. Shell large, pellucid, polished, little elevated. Volutions slightly convex. 
Lip simple. Umbilicus open, broad, profound; its margin furrowed by the tranverse 
wrinkles, which become effaced towards the periphery of the body-whorl. Aperture large, 
simple, semilunate. 
Color. Light waxen, polished, with greenish tinge ; interior of the mouth rosaceous. 
Diameter, 1°0. 
This species has been detected near Troy in this State, by Dr. Newcomb. It is allied to 
the following species, from which, however, I suppose it to differ constantly in size. 
HELrIx CELLARIA. 
PLATE Ill. FIG.25 a.s.—(STATE COLLECTION.) 
Heliz ceilaria. | Mutter, Verm. Hist. No. 130. 
Hi. glaphyra, Say, Nich. Ency. Ed. Am. Vol. 4, pl. 1, fig. 3. 
H.  nitida. Draparnavp, Moll. pl. 8, fig. 23 to 25. 
H. cellaria. Binney, Bost, Jour. Nat. Hist. Vol. 3, pl. 26, fig. 2. 
H. id. Gow p, Invertebrata of Mass, p. 180, fig. 104. 
Description. Shell moderately small, orbicular, depressed, concave beneath, thin, fragile, 
smoothly polished. Whorls five, slightly convex, with irregular obsolete transverse wrinkles. 
The umbilicus moderate, gradually enlarging towards the circumference of the body-whorl. 
Lip simple, thin, acute and regular. Aperture lunate, broader than high. 
Color. Waxen or whitish, polished, slightly tinged with greenish, with deeper colored ver- 
tical strie; within the aperture, purplish. Animal light indigo-blue above, darkest on the 
head; collar greenish. 
Diameter of the shell, 0°3 — 0°5. 
This animal is now supposed, by the most recent Amerjcan conchological writers, to be 
identical with the cellaria of Miller, and to have been introduced about water-casks, green- 
house plants, etc. It is often confounded with inornata of Say, in the immature state of the 
latter species, when the umbilicus is but small. 
