UNIO 629 
and teeth as there is in the nacre. A number of varieties 
might be made but most of them so completely mix with the 
typical form that it hardly seems worth while to designate 
them. 
Var. orcutin S. H. Wright. 
Shell almost evenly ovate, rather inflated, subsolid or solid: 
epidermis smooth and shining, generally bronzy or coppery, 
rayed with green; nacre rich and brilliant, frequently golden, 
coppery or bronzy, and iridescent. 
Length 65, height 39, diam. 26 mm. 
Type locality, Myakka Lake and River, Manatee County, 
Florida. 
The type of this was collected by the writer and sent to Mr. 
Wright and it came from the Myakka River or Lake. It is 
found in other Floridan localities. 
Unio orcuttu S. H. Wricut, West. Am. Sci., IV, 1888, p. 60, 
3 figs. 
Unio buckleyi var. orcuttii StMPSON, Syn., 1900, p. 713. 
Unio JAYENSIS Lea. 
Shell rather elongated, subovate or subrhomboid, often being 
slightly winged, in which case it assumes the latter form, con- 
vex to subinflated, inequilateral, generally rather thin; beaks 
only moderately full and elevated, their sculpture consisting 
of irregular, corrugated, somewhat doubly-looped ridges; pos- 
terior ridge rounded or subangular above, generally double 
below. ending behind in a more or less definite biangulation at 
or below the median line; surface with uneven growth lines; 
epidermis often shining yellowish or yellow-green and rayed 
in young shells, greenish-brown or blackish and dull in old 
ones; pseudocardinals and laterals delicate; beak cavities shal- 
low ; nacre generally purplish, sometimes salmon-tinted, usually 
dull. 
Type locality, Florida. 
