204 



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



85. G. decora. Lea. 



Melania decora, LeA, Philos. Proc, ii, p. 14, Feb., 1841. Philos. Trans., viii, p 181, 

 t. G, f. 38. Obs., iii, p. 19. DeK.w, Moll., X. Y., p. 08. BixxEY, Cheek List, 

 No. 85. Teoost, Cat. ShelLs, Tenn. Wiieatley, Cat. Shells, U. S., p. 25. 

 Reeve, Monog. Melauia, sp. iiJ2. Catlow, Couch. Nomenc , p. ISU. Brot, 

 List, p. 35. 



Description. — Shell folded, acutelj' turreted, rather thin, horn-color, 



above striate ; spire acute, elevated ; sutures impressed; whorls nine, 



rather flattened ; aperture small, elliptical, whitish. 



Fi"-. 401 Habitat. — Tennessee: Green River, Kentucky. 



Diameter, -20; length, -82 of an inch. 



Observations. — This species resembles M. costiilata, herein 



described. It is, however, more elevated in the spire, and 



the folds are closer. On the two lower whorls the folds 



become obsolete. — Lea. 



Reeve's figure is either a veiy poor one or it does not rep- 

 resent this species. It is scarcely necessary to add that his 

 locality "Niagara" is entirely wrong, as no plicate species is 

 found there. 



86. G, crebricostata, Lea. 



Melania crebricostata, Lea, Philos. Proc, ii, p. 13, Feb., 1841. Philos. Trans., viii, 

 p. 17!), t. G, f. 35. Obs., iii, p. 17. DeKay, Moll., New York, p. 97. Jay, Cat. 

 4th edit., p. 273. Troost, Cat. Shells, Tenn. Wheatley, Cat. Shells, U. S., 

 p. 24. Eeeve, Monog. Melauia, sp. 374. Binney, Check List, No. 74. Brot, 

 List, p. 35. 



Melasma crebricostata, Lea, Chenu, Man. de Conchyl., i, f. 1099. Adams, Genera, 

 i, p. 300. 



Description. — Shell closely folded, conical, rather thick, horn-color; 

 spire elevated ; sutures linear; whorls seven, flattened ; 'ipcr- j^jg^^j. 

 ture small, elliptical, below angular, bluish. 



Habitat. — Robinson County, Tennessee. 



Diameter, -28 ; length, -90 of an inch. 



Observations. — This is rather a slender shell, and is peculiar 

 for its numerous folds, which are slightly curved and parallel. 

 They extend over the whole shell, except the inferior half of 

 the body-whorl. The aperture is about one-third the length of the 

 shell. — Lea. 



The species is a common oi.e. Dr. Brot suggests that this 

 species should, perhaps, be united with M. costulata ; I think, 

 however, that they are sulllciently distinct. 



