648 UNIO 
Unio pine: B. H. Wricut, Naut., XI, 1897, p. 40.—Simpson, 
Pr. Ac; N.Set., Phila, 1900; prso, pip, fis? PSyn. 1900; 
pazvic: ; 
Unio suttoni B. H. Wricut, Naut. XI, 1897, p. 56. 
Possibly a decidedly rhomboid form of U. buckleyi. Two 
shells before me from Saratoga, Florida, agree very well with 
this, but are darker and practically rayless. U. suttoni does 
not seem to me to be specifically or even varietally different. 
Unio oscar B. H. Wright. 
Shell elongated, subsolid, inflated, irregularly elliptical or 
suhrhomboid, inequilateral; beaks apparently full and high, 
their sculpture not seen; posterior ridge high, angled and sin- 
gle above, narrowly and faintly double below, ending in a 
biangulation at or below the median line; dorsal and ventral 
lines slightly rounded; dorsal slope subtruncated, anterior end 
usually a little narrowed, rounded; surface with low, uneven, 
concentric sculpture; epidermis tawny-brown, shining, rayed 
in young shells; pseudocardinals low, subcompressed, often 
partially obliterated; laterals remote, rather feeble; all the 
teeth granular or somewhat vertically striate; muscle scars 
.well impressed, large; nacre purple, coppery or bronzy. 
Length 61, height 28, diam. 24 mm. 
Florida. 
Type locality, Creek from Lake Osceola, Winter Park, Fla. 
Unio oscari B. H. Wricut, Naut., V, 1892, p. 124; IX, 1896, 
p. 122, pl. 1, figs. 1-3.—StMPsON, Syn., 1900, p. 719. 
Close to U. hazelhurstianus but more inflated, apparently 
smaller, with brighter brown epidermis and less perfect teeth. 
UNIO HAZELHURSTIANUS Lea. 
Shell elongated, irregularly elliptical, inequilateral, convex 
to subinflated, subsolid; beaks apparently not full or high; pos- 
terior ridge double, ending in a biangulation at or below the 
median line; dorsal and basal lines usually a little rounded ; 
anterior end subtruncate, sometimes cut away slightly below 
and angled above; epidermis black ; left valve with two stumpy 
