FAMILY HELICIDZ — HELIX. 33 
HELIx concava. 
PLATE II. FIG. 15, a. 3. ——(STATE COLLECTION.) 
Helix concava. Say, Journ. Acad. Nat. Sciences, Vol. 2, p. 159. 
HH id, Wueat_ey, Cat, Shells U. S. No. 492, p. 19. 
Description. Shell much depressed, orbicular. Whorls five, irregularly wrinkled across, 
and more convex beneath. Suture distinctly impressed. Lip simple, very slightly reflexed 
towards the base. Aperture large but short, in the line of the axis of the shell. Umbilicus 
large, funnel-shaped, exhibiting distinctly all the volutions (which are there very prominently 
corrugated) to the summit. 
Color. Light corneous, or whitish with a tinge of yellowish green, immaculate. 
Diameter, 0°7. Height, 0°35. 
Of this remarkably distinct species, I have received specimens from the western district of 
this State, and from the neighborhood of Lake Champlain. It does not appear in Gould’s 
Catalogue of the Shells of Massachusetts. Mr. Wheatley, however, assigns its locality in 
the Eastern States. To the west it seems to be more numerous, and has been noticed in 
Ohio and Missouri. 
HELIX PALLIATA. 
PLATE Ill. FIG. 36. a4. 5. PLATE II. FIG. 16. a. 8. Vartety. — (STATE COLLECTION.) 
Helix palliata. Say, Journ. Acad. Nat. Sciences, Vol. 2, p. 152. 
H.  obstricta. Ip. Journ. Acad. Nat. Sciences, Vol. 2, p. 154. 
H,  denotata, FeErussac, Histoire des Moll. Pl. 49, A. fig. 5. 
H. carolinensis. Lea, Am. Phil. Trans. Vol. 4, p. 102, pl. 15, fig. 33. 
Carocolla helicoides. Ip. Am. Phil. Trans. Vol. 4, p. 159, pl. 15, fig. 34. 
H. palliata. Binney, Journ. Nat, Hist. Vol. 3, p. 353. 
Helice notable. LAMARCK, An. sans vert. Ed. Brux. Vol. 3, p. 309. 
Description. Shell subdepressed or depressed, with elevated revolving and minute trans- 
verse lines, and numerous minute tubercles with scattering stiff hairs. Whorls five, very 
slightly convex above, distinctly convex beneath, and forming in one variety (Pl. 2, fig. 16, 3.) 
an obtuse angle, appearing like a prolongation of the broadly reflected lip. Aperture usually 
trilobed. Umbilical region covered with a white callus. Lip widely reflected, with two ob- 
tuse sinuses on each side, forming a prominent tooth between them, and a third profound sinus 
near the middle of the lip ; occasionally a single tooth on the outer lip. Pillar with a large 
white oblique tooth. 
Color. Reddish brown ; reflected portion of the lip white, tinged occasionally with blue. 
Diameter, 0°7-0°9. Height, 0°5. 
Fauna — Parr 6. 5 
