SYNOPTICAL TABLE 
OF THE 
SPECIES OF AMERICAN NAIADES, 
WITH 
SYNONYMES. 
UNIO. 
Unio abruptus, 
Say, 
( cyclips, Raf. 
( calendis, Raf 
arctatus, 
Conrad, 
arcus, 
Conrad, 
apiculatus, 
Say, 
asper, 
Lea, 
acutissimus, 
Lea , 
angustatus, 
Lea, 
*ater, 
Lea, 
lugubris, Say, 
alatus, 
Say, 
( megaptera, Raf. 
( Symphynota alata, Lea, 
tAlabamensis, Conrad, 
Symphynota inflata, Lea, 
* Unio lemovincce , Fer. is U. ater , Willson. See Synopsis 
methodica Molluscorum. By M. Menke. Mr. Say supposing the 
ater of Nil. a good species, substituted the name lugubris for U. 
ater of Lea. 
1 1 propose this name for the fine shell whose specific inflata 
is preoccupied in the genus Unio. It is peculiarly abundant in 
the Alabama, rare in the Black Warrior, and has as yet been 
found in no other river. 
