302 Miscellaneous. 



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. aratus. Trapezoidal, thick; valves flattened on the sides, 

 slightly contracted, marked with irregular arched, obtuse, inter- 

 rupted folds, extending from the beaks nearly to the base ; umbonial 

 slope angular ; posterior slope plicated ; beaks not prominent, pro- 

 foundly 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, sulcated ; lateral teeth slightly arched. 



Inhabits Flint River, Georgia. 



Allied to U. Sloatianus and trapezoides, Lea. 



Margaritana, ScJium. 



M. Etowaensis. 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 sub- 

 margin slightly concave ; umbonial slope angular posteriorly ; beaks 

 eroded ; posterior extremity angular ; margin rounded towards the 

 base ; basal margin subrectilinear ; within bluish and purplish, irides- 

 cent ; cardinal tooth in the right valve rather long, oblique, com- 

 pressed, 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. coelatura. Ovate-oblong, turreted ; volutions 6, with longi- 

 tudinal 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 colu- 

 mella somewhat callous. 



Inhabits Savannah River. 



M. 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. 



M. nebulosa. Elongate- conoidal ; volutions 6 or 7, with revolving 

 raised lines ; whorls of the spire carinated below the middle, above 

 which they are longitudinally ribbed, and have two or three revolving 

 granulated lines ; granules compressed ; aperture widely elliptical ; 

 colour ochraceous, with brownish black stains. 



Inhabits Savannah River. 



M. percarinata. Elongate-conoidal ; volutions of the spire with 

 a carinated line below the middle, and a revolving granulated line 

 above ; body whorl with a granulated revolving line near the suture. 



