ee | PROCEEDINGS OF THE NATIONAL MUSEUM. 423 
Unio micans Lea. 
(Plate Lxv, Fig. 3.) 
Unio micans Lea. Obs. vu, p.63, Pl. 11, Fig.207. Catawba R., N. C.,C. M. Wheatley 
and Dr. Genth. 
It is also in Mr. Lea’s collection, sent by Dr. Barrett from South Caro- 
lina. An elegant little species, something like a miniature Buckleyi, but 
wider. The epidermis in the dozen specimens before me varies from 
tawny yellow or greenish to fulvous brown. All are rayed, and the 
young are particularly bright colored. The nacre in the anterior of 
most of the shells is dull and sometimes lurid; that of the posterior is 
iridescent. One small shell and a larger right valve belonging to the 
Museum (Museum No. 25146), from the Kidder collection, labeled “ Unio 
trossulus Lea, Sumter County, Florida;” though Jess wide than Lea’s 
specimens, I refer to this species. Itis very close to U. perlucens, Lea. 
Unio Hinkleyi B. H. Wright. 
(Plate txv, Fig. 4.) 
Unio Hinkleyi B.H. Wright. Proc. Acad, Nat. Sci, Phila., 1888, p. 117, Pl. iv, Fig. 2. 
Lake Monroe, Fla. 
A puzzling and doubtful species. Three specimens before me from 
Lake Monroe, sent by Mr. B. H. Wright to the Museum (Museum No. 
91127) as U. Hinkleyi, are probably what he has described as that spe- 
cies. Two agree very well with his figure and description except that 
the nacre is coppery; the third approaches the form he has called Dalli, 
and has a lurid, blotched nacre. I have examined several other shells, 
some of which approached Buckleyt and others monroensis. 
I let the species stand because I can not refer it to any known form. 
It seems to reach out in several directions, and to connect more or less 
with Buckleyi, monroensis, and Downiei, and to strongly hint that a 
large number of so-called species of the southeastern waters are but 
variations of an unbroken chain. 
Unio Ferrissii Marsh. 
(Plate txvi, Figs. 1, 2.) 
Unio Ferrissti Marsh. Joliet Weekly News (a newspaper), May 1, 1891. The Nauti- 
lus, Vol. v, No. 3, p. 30. 
Shell oblong, inflated, smooth before, slightly plicate posteriorly, 
rather thick and solid; epidermis dark green or black and shining, with 
capillary rays, sometimes rayless; squarish before, pointed behind; 
unbonial slope raised, obtusely rounded. Cardinal teeth compressed, 
thick and solid, oblique, single in the right valve, double in the left, 
striate. Lateral teeth short and slightly curved; anterior cicatrices not 
confluent, very deep, posterior cicatrices distinct; nacre pink and iri- 
descent. A small creek near Palatka. The above is the original de- 
scription. A puzzling form allied to U. Buckleyi on the one hand and 
the crassidens group on the other, The specimens I have seen have 
