UNIO 619 
Unio hinkleyt B. H. Wright, Pr. Ac. N. Sci. Phila., 1888, p. 
p. 117, pl. iv, fig. 3—Simpson, Pr. U. S. Nat. Mus., XV, 
T8902, ).422.-pl, EX, 1. 45 Syn., 1900, p. 7.10. 
I have before me what is said to be the type from Mr. B. H. 
Wright, but, if it is, the figure is not correctly drawn. The 
shell is more pointed behind and straighter on the base than 
the figure shows. ‘The species, if species it is, would go in the 
buckleyi group as well as in this. 
JNIO WEBSTERI B. H. Wright. 
Shell somewhat elongated, subrhomboid, convex, rather thin, 
inequilateral; beaks only moderately full and elevated: pos- 
terior ridge angled, becoming almost double below, ending in a 
rounded point or biangulation a little above the base ; basal and 
dorsal lines somewhat rounded; surface with irregular 
growth lines sometimes wrinkled behind; epidermis reddish- 
brown to blackish, somewhat rayed in young shells; left valve 
with two compressed or subcompressed pseudocardinals and 
two remote laterals; right valve with one pseudocardinal and 
one lateral; muscle scars shallow; nacre bluish to purplish. 
Length 97, height 55, diam. 32 mm. 
Florida. 
Type locality, Lake Woodruff, Volusia Co., Fla. 
Unio websteri B. H. Wricit, Pr. Ac. N. Sci. Phila., 1888, p. 
113, pl. 11, fig. 2—Srimpson, Syn., 1900, p. 7II. 
A very unsatisfactory species, if it is a species. Mr. Wright 
has sent three examples to the National Museum, which he 
claims are typical, but neither of them agree very closely with 
his figure. The two younger shells are rayed, they are differ- 
ently shaped from the older one and have heavier pseudocar- 
dinals. I confess I am at a loss to know what to do with it. 
UNIO porsAtus Lea. 
Shell subrhomboid or sometimes almost subtriangular, in- 
equilateral, convex, subsolid; beaks somewhat elevated but not 
inflated, their sculpture not observed; posterior ridge full, an- 
gled above, becoming double below, ending behind near the 
