46 NEW- YORK FAUNA — MOLLUSCA. 



H. interna. (Say, Ac. Nat. Sc. Vol. 2, p. 155.) Whorls 6-8, with regular elevated transverse lines, 

 which are obsolete beneath. Spire convex, little elevated. Aperture very straight, the transverse 

 less than one half of the longitudinal diameter. Lip not reflected. Umbilicus obsolete or wanting. 

 Two prominent lamelliform teeth within the lip ; the upper largest, and neither attaining the edge 

 of the lip. Color, yellowish red. Diameter, 0-3. Missouri. 

 H. nuttaliana. (Lea, Am. Trans. Vol. 6, p. 88, pi. 23, fig. 74.) Shell obtusely conical, large, flat- 

 tened beneath, umbilicate, minutely striated longitudinally. Whorls seven. Lip somewhat re- 

 flected. Aperture nearly round, banded within. Yellowish above, dark brown below ; near the 

 carina, banded. Diameter, 1 • 3. Oregon. 

 H. columbiana. (Id. 1. c. Vol. 6, p. 87, pi. 23, fig. 75.) Shell moderately large, obtusely convex, 

 rounded beneath, umbilicate. Whorls six, roundish. Lip white, reflected, slightly callous below. 

 Color, corneous, polished, longitudinally striate, transparent. Diameter, 0*7. Columbia River. 

 H. californiensis. (Id. 1. c. Vol. 6. p. 99, pi. 23, fig. 79.) Shell moderately large, globose, imperfo- 

 • rate, granulated. Whorls five. Lip reflected : columella smooth. Color, brownish, with a dark 

 revolving band. Diameter, • 7. California. 

 H. gularis. (Say, Jour. Acad. Vol. 2, p. 156.) Very small, subglobose, polished, pellucid. Whorls 

 6-7, with prominent wrinkles. Spire convex, a little elevated. Suture moderate. Lip not re- 

 flected. Throat bidentate, far within on the side of the lip. Teeth lamelliform, of which one is 

 oblique and near the middle, and the other shorter and near the base. Umbilicus none. Color, 

 yellowish horn ; beneath opake, whitish yellow. Diameter, 0*3. Ohio. 

 A southern species often confounded with suppressa. 

 H. townsendiana. (Lea, Am. Phil. Tr. Vol. 6, p. 99, pi. 23, fig. 80.) Shell large, obtusely conical, 

 longitudinally striate, rough, umbilicate. Whorls five. Aperture nearly round. Lip reflected ; 

 columella smooth. Color, brownish. Diameter, 1 *0. Columbia River. 

 H. jejuna. (Say, Jour. Acad. Nat Sc. Vol. 2, p. 158.) Shell small, subglobular, glabrous. Whorls 

 five, regularly rounded and slightly wrinkled: spire convex; suture rather deeply impressed. 

 Aperture dilate, lunate. Lip not reflected, a little thicker within. Umbilicus open, small. Color, 

 pale reddish brown. Diameter, • 3. Southern States. 

 H. oregonensis. (Lea, Tr. Am. Phil. Vol. 6, p. 100, pL 23, fig. 85.) Shell moderately small, sub- 

 carinate, thin, smooth ; above, slightly convex ; below, somewhat inflated. Color, reddish brown 

 a dark brown and white band on the carina. Diameter, 0*6. Oregon. 

 H. dealbata. (Say, Jour. Acad. Nat. Sc. Vol. 2, p. 159.) Shell moderately small, conical, oblong, 

 thin, fragile, and somewhat ventricose. Whorls six or seven, wrinkled across, more deeply so on 

 the spire. Spire elongated, subacute, longer than the aperture, which is longer than wide. Lip 

 not reflected. Umbilicus small and deep. Diameter, 0*5. Alabama, Missouri. Resembles a 

 Bulimus. 

 H. wardiana. (Lea, Tr. Am. Phil. Soc. Vol. 6, pi. 23, p. 67, fig. 82.) Shell convex, rounded, umbilicate, 

 flattened below, translucent. Whorls six, longitudinally striate : spire obtuse : lip acute, thickened 

 within. Color, polished corneous ; animal with black stripes along the side. Diameter, - 4. 

 Ohio. Resembles ligera. 



