154" [February, 



U. nncleopsis. Obtusely subovate, slightly oblique, thick, not ventricose ; 

 umbonial slope rounded ; posterior slope with a few obscure plaits ; posterior 

 nnargin subtruncated ; basal margin slightly tumid near the middle ; epidermis 

 ochraceous, with a series of green spots along the umbonial slope ; posterior 

 slope obsoletely striated ; within bluish white ; cardinal teeth thick, direct, single 

 in the right valve. Ij. 



Inhabits Etowah River. 



U. limatuliis. Siibelliptical, convex ; posterior side somewhat pointed; um- 

 bonial slope angular; posterior slope subcarinated in the middle; posterior 

 margin obliquely truncated; extremity truncated, direct; basal margin regu- 

 larly rounded; beaks not prominent, eroded; epidermis highly polished, dark 

 brown and ochraceous, obscurely rayed ; within flesh colour or pale salmon ; 

 cardinal teeth oblique, compressed, double in each valve ; lateral teeth long, 

 slightly curved. 2. 



Inhabits Savannah River. 



U. aratas. Trapezoidal, thick; valves flattened on the sides, slightly con- 

 tracted, marked with irregular arched, obtuse, interrupted folds, extending from 

 the beaks noai^ly to the base; umbonial slope angular; posterior slope plicated; 

 beaks not prominent, profoundly eroded ; ligament margin elevated; posterior 

 extremity truncated obliquely inwards; basal margin contracted; epidermis 

 nearly black; within white, with a purple margin; cardinal teeth direct, very 

 thick, sulcatcd ; lateral teeth slightly arched. 



Inhabits Flint River, Georgia. 



Allied to U. Sloatianus and trajiezoides. Lea. 



JMaruarttana, Sc/ium, 



M. Elotoaensis. Oblong-ovate, thin and fragile, widely contracted from beak 

 to base; umbonial slope ventricose, with a plano-convex or flattened surface; 

 ligament margin rather elevated; posterior submargin slightly concave; umbo- 

 nial slope angular posteriorly; beaks eroded; posterior extremity angular; 

 margin rounded towards the base; basal margin subrectilinear ; within bluish 

 and purplish, iridescent; cardinal tooth in the right valve rather long, oblique, 

 compressed, curved, prominent; in the opposite valve the tooth is widely bifid, 

 the posterior lobe pyramidal. 



Inhabits Etowah River. 



Allied to M. Raveneliana, Lea. 



Melania. 



M. calatura. Ovate-oblong, turreted ; volutions 6, with longitudinal ribs and 

 unequal prominent revolving lines, subnodulous where they cross the ribs ; the 

 ribs on the body whorl do not reach the middle ; the colour ochraceous and 

 brown; aperture narrow, elliptical ; labium with interior brown bands; superior 

 part of columella somewhat callous. 



Inhabits Savannah River. 



Melania perangulata. Subulate; volutions 9 or 10, with an acutely carinated 

 angle on all except the body whorl, which is subcarinated ; on each whorl of the 

 spire is a revolving granulated line above the carina; colour olive brown. 



Inhabits Savannah River. 



