Descriptions of New Fluviatile Shells. 93 



11. Ulelania virens. 



Plate II. Fig. 11. 



T. ovato-conica, glabra, suberassa, virente ; spira obtuse elevata, de- 

 collate ; anfr. superstitibus 5, convexis, ultimo amplo ; suturis valde 

 impressis ; apertura ovata, magna, albido-ccerulescente ; columella in- 

 curva, subreflexa, in sinum inconspicuum producta. 



Shell ovate-conic, smooth, rather thick, spire rather obtusely 

 elevated, with a somewhat convex outline, and with sutures 

 decidedly impressed ; color light uniform green, paler towards 

 the summit; whorls, five only remaining, and indications of 

 one lost by truncation, convex ; aperture rather large, ellipti- 

 cal, bluish within ; columella well rounded, not perceptibly in- 

 dented, and with a small recurved sinus at base. 



Length 0.87 inch (22 millim.). Diam. 0.40 inch (10 millim.). 



Length of aperture 0.42 inch (10 millim.). 



Breadth of do. 0.21 inch (5 millim.). 



Habitat. — Alabama. 

 My cabinet. 



Obs.—A broad species with an outline and proportions not 

 unlike a Paludina, to which genus its pale uniform green color 

 also seems to ally it. I am not sure that it should not be re- 

 ferred to that genus. It cannot be compared with any known 

 species. 



12. Ulelania ampla. 



Plate II. Fig. 12. 



T. ovato-conica, glabra, tenui, fulvo-virente ; spira obtuse elevata ; 

 anfr. 5-6, subconvexis, superioribus viridi unifasciatis, ultimo amplo, 



