618 UNIO 
Unio HAR?wrRIGHTI B. H. Wright. 
Shell subrhomboid, subinflated, subsolid, inequilateral, with 
full, high beaks, whose sculpture has not been observed; pos- 
terior ridge high, pinched up above almost into a carina, be- 
coming almost double below and ending in a point just above 
the base; post-dorsal slope obliquely truncated above, some- 
what biangulate below; surface nearly smooth, with a few 
low, concentric ridges, decidedly wrinkled on the dorsal slope: 
epidermis rich, reddish-brown, faintly rayed; left valve with 
two subcompressed pseudocardinals and two remote laterals; 
right valve with one pseudocardinal and one lateral; nacre 
brilliant, salmon in the cavity, tinted purple at the border, iri-- 
descent behind. 
Length 79, height 45. diam. 30 mm. 
Type locality, Lake Beresford, Florida. 
Unio hartwrightt B. HO. Wricut, Naut., 1X, 1896, p. 121, pl.. 
11, figs. .4-6.—SIMPSON, Syn., 1900, p. 710. 
The only specimen, which IT have seen, is the type and this 
has a remarkably high, almost pinched up, posterior ridge, de- 
cided wrinkles behind and rich colored epidermis and nacre. 
Unio HINKLEY! B. H. Wright. 
Shell long rhomboid, inequilateral, subinflated, scarcely sub- 
solid; beaks moderately full, slightly elevated, their sculpture 
not seen; posterior ridge well developed, angled, ending be- 
hind in a point at or near the base of the shell; dorsal slope 
very faintly wrinkled, obliquely truncated; anterior end cut 
away a little below, rounded; base line straight or slightly 
curved; surface nearly smooth; epidermis dark green, shaded 
brown and almost black behind; left valve with two compress- 
ed, reflexed pseudocardinals and two delicate laterals; right 
valve with one pseudocardinal and one lateral; muscle scars 
shallow ; nacre rather bright, purplish, iridescent behind. 
Length 74, height 38, diam. 23 mm. 
Florida. 
Type locality, Lake Monroe, Fla. 
