32 NEW UNIONIDiE OF THE 



salmon color or pale purple, rarely being white, which the Cuvwrianiis usually is. 

 The specimens from the Santee Canal approach closer to comjilanatus. The lower 

 division of the double lateral tooth is much enlarged in the adults towards the poste- 

 rior end, and this in the single tooth in the right valve is curiously enlarged and 

 blunted at the terminus. 



Unio sublatus. pi. 16, fig. 62. 



Testa Iscvi, transversa, ad latere compressa, postice angulata, vald6 insequilatcrali ; valvuli.s subcrassis ; nati- 

 bus prominuHs, ad apices undulatis ; epidermide tonebroso-fusca, valde radiata; dentibus cardinalibus 

 parvis, subpyramidatis, crenulatis, in utroque valvulo duplicibus ; lateralibus longis, lamellatis subrec- 

 tisque ; margarita purpurea et irideseente. 



Shell smooth, transverse, compressed at the side, angular behind, very inequilateral ; 

 valves rather thick ; beaks a little prominent, undulate at the tip ; epidermis dark 

 brown, very much radiated ; cardinal teeth small, somewhat pyramidal, crenulate, 

 double in both valves ; lateral teeth long, lamellar and nearly straight ; nacre purple 

 and iridescent. 



Proc. Acad. Nat. Sci., 1857, p. 169. 



ifai._Uchee Bar, below Columbus, Georgia. Bishop Elliott. 



My cabinet and cabinet of Bishop Elliott. 

 Diam. -5, Length 1, Breadth 2 inches. 



Shell smooth, transverse, compressed and flattened at the sides, angular behind, 

 regularly rounded before, very inequilateral ; substance of the shell rather thick ; 

 beaks slightly prominent, undulate at the tip ; ligament long and narrow ; epidermis 

 dark brown, smooth and shining, with numerous rays over the whole disk ; umbonial 

 slope slightly raised into an indistinct angle ; cardinal teeth very small, somewhat 

 pyramidal, crenulate and double in both valves ; lateral teeth long, lamellar and 

 nearly straight ; anterior cicatrices distinct and well impressed ; posterior cicatrices 

 confluent ; dorsal cicatrices small, and placed on the under side of the plate posterior 

 to the cardinal tooth; cavity of the shell very shallow and wide ; cavity of the beaks 

 shallow and subangular ; nacre purple and iridescent. 



Soft Parts. — Branchial uterus situated on the whole of the outer branchije, except 

 at the extreme ends. Branchio} rather large, rather wide, much rounded below, the 

 inner ones being somewhat the larger, free nearly the whole length of abdominal 

 sack. Palpi rather small, thin, subtriangular, united at the upper portion of the 

 posterior edges. Mantle thin, slightly thickened at the margin, which is without 

 color. Branchial opening rather small, with numerous small reddish brown papillae 

 on the inner edges. Anal opening rather large, with very small reddish brown papillge 

 on the inner edges. Super-anal opening small, slightly colored inside, united for some 

 distance below. Color of the mass whitish inclining to salmon color. 



Emhryonic young very near, in outline, to ligamentinns, Lam., but rather more rotund. 



