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. 
Marearitana, Schum. 
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. celatura. 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 onall 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. y 
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, 
