196 LAND AXD FRESH-WATER SHELLS OF N. A. [PART IV. 



74. G. caliginosa. Lea. 



Melanin caliginosa, Lea, Philos. Proc, ii, p. 15, Feb., 1841. Philos. Trans., viii, 

 p. 189, t. (i, f. 56. Obs., iii, p. 27. Wheatlev, Cat. Shells, U. S., p. 24. Reeve, 

 Mouog. Melania, sp. 2i»3. DeKay, Moll. New York, p, 100. Bixney, Check 

 List, Xo. 44. Troost, Cat. Shells, Tenn. Jay, Cat. 4th edit., p. 273. Catlow, 

 Conch. Xomenc, p. 18.5. Brot. List, p. 34. 



Elimia caliginosa, Lea, Adams, Genera, i, p. 300. 



Description — Shell cancellate, conical, somewhat thick, transversely 



striated ; very dark brown ; spire elevated ; sutures irregularly im- 



pi-essed ; whorls eight, rather convex; aperture small, ellip- 

 Fig. 385. ^ ' "= ' 



tical, purplish within. 



Habitat. — Tennessee. 



Diameter, -34; length, -91 of an inch. 



Observations. — A fine, cancellate species with ten or twelve 



revolving striaj on the body-whorl, crossing the folds. The 



aperture is about one-third the length of the shell. It nearly 



answers to Mr. Conrad's description of 31. nassula, but has 



five strias on the penultimate whorl, while the nasstila has seven. It 



differs from 31. catcnaria, Say, in having a more elevated spire, and 



in having two or three more revolving striae. In some individuals 



the aperture is bluish- white. — Lea. 



75. G. nodulosa, Lea. 



Melania nodulosa. Lea, Philos. Proc, ii, p. 15, Feb., 1841. Philos. Trans., viii, 

 p. 190, t. 6, f. 57. Obs., iii, p. 28. DeKay, Moll. N. Y., p. 100. Binnev, Check 

 List, No. 180. Troost, Cat. Shells, Tennessee. Wheatlev, Cat. Shells, 

 U. S., p. 2G. Catlow, Conch. Nomenc, p. 188. Brot, List, p. 34. Reeve, 

 Monog. Melania. sp. 276. 



Elimia nodulosa, Lea, AD..V3IS, Genera, No. 300. 



Description.— Shell cancellate, conical, thick, dark brown ; sutures 

 irregulaiiy impressed ; whorls somewhat convex ; aperture rather 

 large, elliptical, subaugular below, within bluish. 



X ig. 386. x ig. S8o(l. 



Habitat. — Tennessee. 



Diameter, -34: ; length, -82 of an inch. 



Observations. — Two imperfect specimens only 

 were received from Dr. Troost, and both are 

 much eroded at the apex, consequently the num- 

 ber of whoi'ls could not be ascertained. The 

 body-whorl has about twenty well defined, raised 

 strise, which on the superior part are crossed by folds, giving the 

 whole of the upper part of the shell a granulate appearance. It is 



