THE NAUTILUS. 101 
to by Binney (p. 222) as collected by Hemphill at Clingman’s 
Peak, North Carolina, is doubtfully identical with Bland’s type, 
and should take the varietal name of V. clingmani, which may 
eventually prove of specific rank. 
The present species is named in honor of Mr. Rader, an interested 
student of the land shells of Cumberland, at the request of Prof. 
Shriver. The type is in the National Museum. 
A NEW UNDULATE UNIO FROM ALABAMA. 
BY BERLIN H. WRIGHT. 
Unio triumphans sp. noy. 
Shell sub-triangular, with an elevated wing which is connate at 
its point, coarsely and interruptedly undulate over the entire disk, 
except on the extreme anterior and superior parts where pustula- 
tions and literations replace them. Disk gradually and uniformly 
flattened out to the margins from the highest point near its centre: 
the indistinct umbonal ridge dividing the disk area into two nearly 
equal parts. Substance of the shell moderately thick ; thicker be- 
fore. Epidermis dead black. Greatest diameter in the center of 
the shell. Dorsal notch very long and deep. Cavity of the beaks 
deep. Posterior cicatrices confluent; anterior ones distinct. Lat- 
eral teeth short and distant from the cardinals which are depressed. 
Nacre dull white in front and a bright coppery tinge behind, and 
very iridescent. Width 4 inches, length 5 inches, diameter 2 
inches. 
Habitat, Coosa River, St. Clair Co., Alabama. 
Type in National Museum. 
Remarks: For several years we have had old specimens of this 
shejl and could not place them satisfactorily with any known form. 
In a recent collection of one thousand shells from this vicinity we 
found twenty specimens of all ages which at once made its novelty 
appparent. 
The natural place we assign the species is between U. boykinianus 
Lea and U. multiplicatus Lea, and it also possesses characters of U. 
undulatus Barnes. Compared with the first, our shell is more 
winged and therefore more triangular in outline; the ridges are 
fewer, not so prominent and more broken, like Unio undulatus 
