GONIOBASIS. 



191 



66. G. semicostata, Conrad. 



Melania semicostata, COXRAD, New Fresh- Water Shells, App. p. 7, t. 9, f. 6, 1834. 

 BiNNEY, Check List, No. 241. Brot, Lisc, p. 59. 



Fig. 373. 



Description. — Shell elevated ; longitudiually ribbed; "whorls 

 convex, with fine, spiral striae ; body-whorl without ribs, ob- 

 scurely sti'iated above, subangulated in the middle ; aperture 

 large, obliquely elliptical; within bluish, with brown bauds. 



Habitat. — Inhabits streams iu North Alabama. — Conrad. 



The figure is from the autlior's type specimen in the collec- 

 tion of the Academy of Natural Sciences of Philadelphia. 



67. G. dislocata, Ravexel. 



Melania dislocata, Ravenel, Cat. Shells, p. 11, 1834. Bikney, Checlj List, No. 90, 



Brot. List, p. 35. Reeve, Mouog. Melania, pp. 380. 

 Goniohusis Lindsleyi, Lea, Proo. Acad. Nat. Sei., p.267, 1862. Jour. Acad. Nat. 



Sci., V, pt. 3, p. 319, t. 37, f. 167, March, 1863. Obs., ix, p. 141. 



Description. — Shell ovately turreted, yellowish; whorls convex, 

 longitudinally, plicately ribbed ; ribs obsolete towards the 

 base ; aperture ovate, rather small, a little effused at the base. 

 Habitat. — Dan River, North Carolina. — Eeeve. 



Fig. 374. 



Fi£ 



Mr. Reeve's publication of this species was made 

 the year previous to that of Lindsleyi hy IMr. Lea. 

 I give a figure from Ravenel's t3'pe, which is in pos- 

 session of ]Mr. Anthony. 



Goniobasis Lindsleyi. — Shell folded, cylindrico-conical, rather thin, 

 }'ellowish horn-color, without l^ands; spire conoidal; sutures irreg- 

 ularly and very much impressed ; whorls flattened; clothed with erect 

 folds; aperture rather small, rhoniboidal, bluish white within; 

 outer lip acute, sinuous; columella bent in and twisted. 



Habitat. — Tennessee; President Lindsley and Dr. Edgar. 



Diameter, -31 ; length, -80 of an inch. 



O'lservations. — A few, imperfect specimens only are before 

 me, and the number of whorls cannot be ascertained, probably 

 eight. It is allied to Melania (Goniobasis) costttlata (nobis), 

 but it is more cylindrical, and has the folds further apart. The aper- 

 ture is probably one- third the length of the shell. It lias two or 

 three decussating stria) immediately under the suture wliich make 



