GONIOBASIS. 203 



83. G. striatula. Lea. 



Melania striata. Lea, Philos.-Proe., ii, p. 15, Feb., 1S41. Pliilos. Trans., viii, 

 p. 18G, t. G, f. 49. Obs., iii, p. 21. Tkoost, Cat. Shells, Tenu. Wheatley, 

 Cat. Shells. U. S., p. 



Jnga striata. Lea, CHE.\U, Man. da Conchji., i. f. 2018. Adams, Genera, i. p. 304. 



Melania striatula, LEA, Philos. Proc. ii, p. 237, Dae, 1812. Philos. Trans., viii, 

 p. 248, Obs., iii, p. 83. DeKav, Moll. New York, p. 99. Jay, Cat. 4th edit., 

 p. 275. BiXXEY, Check Ll.^t, No. 249. Catlow, Conch. Nomcnc, p. lo8. 

 Eeeve, Monog. Melania, sp. 4Gj. Buox, List, p. 35. 



Description. — Shell striate, conical, rather thin, dark brown, cari- 

 nate above ; spire somewhat elevated ; sutures impressed ; whorls 

 eight, convex ; aperture small, elliptical, within reddish. 



Ilabitat. — Tennessee. 



Diameter, -21 ; length, -49 of an inch. 



Observations. — Rather a small species of a dark reddish-brown. 

 In some individuals the folds are numerous. In others ^. „^^ ^. ^„„ 



Fig. 398. Fig. 399. 



the strias predominate and cover nearly all the whorls. 

 The aperture is rather more than one-third the length 

 of the shell. — Lea. 



This shell was originally described under the 

 name of striatciy but finding that name to be preoccupied, Mr. 

 Lea subsequently changed it to striatula. Mr. Eeeve's figure 

 is not a good representation of the shell. 



84. G. tripartita. Reeve. 



Melania tripartita, Reeve, Monog. Melania, sp. 3G4, Dec, 1830. Bkot, List, p. 37. 



Description. — Shell acuminated, olive ; whorls eight to nine, some- 

 what rounded, spirally, distantly ridged, the first few strongly keeled, 

 Fig 400 ^^GT^ longitudiually, plicately ribbed, afterwards smooth ; 

 aperture small, semilunar. 



Habitat. ? 



Observations. — This is without doubt, a United States 

 species, but I know of none with which it can be satis- 

 factorily identified. — Eeeve. 



The figure is copied from INIr. Reeve's plate. I 

 do not recognize the species, although it approaches closely 

 to several others of the present group. 



