AMNICOLA. 5 



sembles the viridis Lam. Its habitat, however, is very different, as the 

 viridis lives in cold fountains. {Lea.) 



Paludina nicUiniana, Lea, Tr. Am. Phil. Soc. VI, 92, pi. xxiii, f. 109. 



Amnicola nickliniana, Haldeman, Mon., p. 21, pi. i, f. 12. 



Mr. Lea's figure (fig. 5) not being as correct a representation 

 as desirable of the species, I add another (fig. 6), copied from 

 Haldeman. 



Amnicola protea, Gopld — Shell elongate, slender, variable ; whirls 

 7-8, rounded, divided by a deep suture, simple or variously ornamented, 

 and barred with revolving ridges and longitudinal folds ; aperture ovate ; 

 lip continuous, simple, scarcely touching the penultimate whirl. Length 

 of the largest specimen three-tenths, breadth, one-tenth 

 inch. Fig. 6*. 



From the Colorado Desert (Gran Jornada), Dr. T. H. 

 Webb, W. P. Blake. 



Peculiar from its large size and slender form, though 

 differing greatly in its relative proportions. It differs 

 from all others, in being variously sculptured with re- 

 volving ridges and longitudinal folds, like most Melanice. 

 {Gould.) 



Amnicola protea, Gould, Proc. Bost. S. N. H. V, 129. Amnicola protea. 



Amnicola tenuipes, Coupek— Animal " with the head probosci- 

 diform, sub-bifid, sub-cylindrical ; foot strap-shaped, anterior portion ex- 

 tending laterally, and emarginate before ; tentacles setaceous ; eyes at the 

 external base of the tentacles ; color, except the head and eyes, mottled white. 



Shell " small, one and a half lines long, subumbilicated, oblong-ovate, 

 turreted, thin, smooth, lines of growth very slightly marked ; 

 color light brown ; volutions five, suture slightly impressed ; 

 aperture ovate, oblong, angulated above, rounded at base ; la- 

 brum simple, sharp. 



" Found in the rice-field ditches at Hopeton, Georgia ; move- 

 ment active, made by the joint action of the head and foot, 

 the head advancing before the foot ; floats on the surface of the 

 water in an inverted position." (Couper in Haldeman.) 



Amnicola tenuipes, Coupee, in Haldeman's Mon. 23, pi. i, f. 14 — 15 ; No. 

 7, p. 4 of wrapper. 



Amnicola sayana, Anthony — Shell lengthened, conic. Fig. 8. 



composed of six very convex shining whirls ; suture strongly ^ 



impressed ; lines of growth very fine ; base with a narrow um- r^ 



bilic ; aperture suborbicular ; the labium slightly flattened, a ^-^ 



small portion of it in contact with the body whirl. Amnicola 



Color bright yellowish-brown, translucent. Inhabits south- sayana. 

 western Ohio. 



