1888.] NATURAL SCIKXCES OF PHILADELPHIA. 113 



DESCRIPTIONS OF NEW SPECIES OF UNIONES FROM FLORIDA. 

 BY BERLIN HART WRIGHT, PENN YAN, N. Y. 



TTnio Fryanus. Plate II, fig. 1. 



Sliell elliptical, very smooth, very inequilateral, substance of the 

 shell thin, inflated in the umbonial region, beaks projecting very 

 slightl}^ beyond the hinge line, ligament short, thin and light brown. 

 Epidermis yellowish red and covered with liright green rays which 

 are so thickly set upon the upper portion of the shell as to give that 

 part, a bright green color: the young are of a bright shining green 

 over the entire surface, the green being interrupted by heavy lines 

 of growth of a light red color. Ligamental margin sub-angular 

 before and slightly arched, posterior margin disposed to be slightly 

 bi-angular and quite uniformly rounded above, anterior margin 

 abruptly rounded ; basal margin uniformly rounded ; cardinal and 

 lateral teeth double in the left and single in the right valves, the 

 cardinal teeth short, oblique stout and crenulate, lateral teeth slightly 

 and uniformly curved, dorsal cicatrices deep and slightly posterior 

 to the cavity of the beak, anterior cicatrices slightly impressed and 

 distinct. Nacre quite uniformly purplish. 

 Diameter .60. Length 1.00. Breadth, 1.75 inches. 



Habitat. Lake Ashby, Volusia County, Florida. 



Mus. Acad. Nat. Sciences. Phila. Newcomb Coll., Cornell Univ. 

 National Museum, 



Remarks. This species is highly polished, and the young are 

 rich in lustrous rays. The strongest affinity is with TJ. spams Lea. 

 It approaches TJ. fuscatus Lea, but is thicker through the umbonial 

 elevation, and the umbos are farther forward, and its valves thicker, 

 heavier, and not so flat. The dorsal view shows it is enlarged anteriorly, 

 while that of Juscatus is not so. It can not be mistaken for U. per- 

 lucens or U. micans Lea. Abundant on the muddy bottom of the 

 outlet of Lake Ashby, Volusia Co. Fla. 



Named for Mr. T. Marshall Fry, of Syracuse, N. Y. who is an 

 enthusiastic collector and student of the Unionidse. 



TJnio Websterii Plate II, fig. 2. 



Shell oblong, inequilateral, considerably inflated, rounded at the 

 sides, surface roughened by numerous obtuse irregular lines of 

 growth, substance of the shell thin, ligamental margin moderately 

 arcuate and rather short, posterior margin slightly biaugular, liga- 



