FM Se I Os AD 
Description of New Fresh Water and Land Shells. By Isaac Lea. Read August 18, 1843. 
Heretofore, very little examination of the rivers and lakes of Florida has been made 
for the mod/usca inhabiting them, two or three Undones only having been described from 
that territory. Recently, I have been fortunate enough to obtain, through the kindness 
of Dr. Budd, of New York, a number of specimens which were collected by Mr. Samuel 
B. Buckley, and sent to him. Among them I found only two species before described— 
the Unio Blandingianus, (Nobis,) and Unio modioliformis, (Nobis.) The number of new 
ones proposed in this paper, from that territory, is nine species of Uniones. The 
remainder, from other localities, I owe to the kindness of various friends. 
Unto amyepatum, Pu. 39. Fira. 1. 
Testa obovatd, subinflatd, valde inequilaterali, postice rotundatd; valvulis subtenwibus; natibus prominentibus; epidermide 
politd, radiata; dentibus cardinalibus parvis; lateralibus sublongis curvisque; margarité albd et valde iridescente. 
Shell obovate, somewhat inflated, very inequilateral, rounded behind; valves rather thin; beaks somewhat promi- 
nent; epidermis polished, smooth; cardinal teeth small; lateral teeth rather long and curved; nacre white and very 
iridescent. 
Hab. Lake George, Florida. §S. B. Buckley. 
My cabinet and cabinets of Dr. Budd and Mr. Buckley, 
Diam. .5, Length .9, Breadth 1.3 inches. 
Shell obovate, somewhat inflated, very inequilateral, rounded and compressed behind ; 
umbonial slope rounded; substance of the shell rather thin; beaks somewhat prominent ; 
ligament very short and thin; epidermis smooth and polished, with numerous green rays 
covering the whole disk; cardinal teeth small, single in the right and double in the left 
valve; lateral teeth rather long and curved; anterior cicatrices distinct; posterior cica- 
trices confluent; dorsal cicatrices placed above the centre of the cavity of the beaks; 
cavity of the shell deep and rounded; cavity of the beaks rather deep and angular; nacre 
beautifully pearly and highly iridescent. 
Remarks.—This is a small and uncommonly beautiful species. ‘The two specimens 
before me vary but little in size. They seem to be adult—are about the size of Unio 
glans, (Nobis,) but differ from it entirely in the nacre, in having rays and in being 
obovate. The epidermis is yellow, but the numerous and close rays which cover the 
VOL. 1X.—'73 
