380 LAND AND FRESH-WATER SHELLS OF N. A. [pART IV. 



Operculum ovate, dark brown, with the polar point near to the 

 inner lower edge. 

 Habitat. — Coosa River, Alabama; E. E.. Showalter, M.D. 

 Diameter, "32 ; length, -50 of an inch. 



Observations. — This is rather a small species ; at least the specimens 

 before me indicate this. There appear to be about six whorls, the 

 upper ones being disposed to put on indistinct folds. The lower 

 whorl is flattened on the middle, has a distinct shoulder above, 

 the top of which is j-ellowish. It is furnished with three dark, 

 Fig. 714. broad bands. There is no appearance of a hem below the 

 suture. The upper whorls are slightly inflated. The lines 

 of growth arc distinctly marked. The aperture is nearly 

 two-thirds the length of the shell, and the base is subangular, 

 and disposed to form a channel like Lithasia. The three dark, broad 

 bauds are well marked within the aperture. This species is nearer 

 in general outline and color to hulbosa, Anthony, than any which 

 have come under my notice, but it does not belong to the deep fis- 

 sured group and the spire is bj' no means so high. The aperture is 

 more than half the length of the shell. — Lea. 



Species unknoionto me. 

 Gyrotoma -conica, Shuttleworth (ubi), Bkot, List, p. 27, 



Genus ANCULOSA, Sat. 



Anculosa, Sat, Jour. Acad. Nat. Sci., ii, p. 178, Nov., 1821. Conrad, 

 Am. Jour. Sci., xxv, p. 3i2, 1831. Muller, Syn. Test. Viv., p. 

 39, 183G. Swainson, Manual Malacol., 1840. Haldeman, Suppl. 

 to Monog. Limniades, Oct., 1840. Sowerbv, Conch. Manual, 

 2d edit., p. CG, 1842. Wheatlet, Cat. Shells U. S., p. 27, 1845. 

 Lea, Philos. Trans., ix, p. 14, I84G. Antuont, Proc. Acad. Nat. 

 Sci., p. -67, Feb., 18G0. 



A7iculosa, Conrad, IlEitMANNSox, Indices Gener. Malac, i, p. 51, 1846. 



Anculotus, Say, Jour. Acad. Nat. Sci., v, pt. 1, p. 128, Aug., 1825. 

 Conrad, New Fresh Water Shells, p. 62, 1834. Couthuoy, Bost. 

 Jour., ii, p. 184, Feb., 1839. Anthony, Bost. Jour., iii, p. 278, 

 Jan., 1840. DeKay, Moll. N. Y., p. 101, 1843. Ciienu, Bibl. 

 Conch., i, iii. Conrad, p. 26, 1845. Gray, Genera, Zool. Proc, 

 XV, p. 153, 1847. Woodward, Manual, i, p. 131, 1831. Jay, Cat., 

 4th edit., p. 27G, 1852. Hiceve, Couch. Iconica, Sept., ISGO. 



Ancylotus, Say, IIer."Mannson, Indicos Gcu. Mai., i, p. 51, 1S4G. 



