Descriptions of New Fluviatile Shells. 



95 



magna, elongato-ovata, intus rubescente ; columella subfoveata, sinum 

 vix formante. 



Shell ovate, rather thin; smooth, chocolate-colored; spire 

 obtusely elevated; whorls about 6, sub-convex; body whorl 

 large, substriate ; sutures moderately impressed ; aperture large, 

 narrow ovate, reddish within; columella indented, with a 

 broad, not very remarkable sinus at base. 



Length 1 inch (26 millim.). Diam. 0.48 inch (12 millim.). 



Length of aperture 0.48 inch (12 millim.). 



Breadth of do. 0.23 inch (6 millim.). 



Habitat. — Alabama. 



My cab. Cab. Lye. Nat. Hist., K Y. B. W. Budd, M.D. 



Obs.—In form not unlike M. olivula Con., but its very pecu- 

 liar plain, dark, chocolate-colored epidermis and sombre interior 

 will at once distinguish it from all other species. A few irre- 

 gular striae are visible on the body whorl, and a very obscure 

 narrow band may be observed near the sutures ; in all of the 

 three specimens before me the columella is slightly reflected 

 over a narrow umbilical opening near the base, which appears 

 almost disconnected from the outer lip as in Achatina. The 

 burnt appearance of the shell has suggested its specific name. 



H. Ulelania araclinoidea. 



Plate II. Fig. 14. 



T. conica, tenui, fusco-cornea ; spira gracili, elevata ; anfr. 12, plicis 

 transversis et liris spiralibus decussatis, lira centrali in carinam elevata, 

 subter quam plicae evanescunt; suturis valde impressis; apertura parva, 

 ovata, intus purpurascente ; columella incurva, in sinum angustum 

 producta. 



Shell conic, rather thin, horn-colored; spire slender and 



