300 L. Agassiz on Fishes of the Tennessee River. 
referred by them to the genus Centrarchus. This species how- 
ever belongs neither to Ceutrarchus nor to Pomotis, if we are to 
consider genera as expressing the same general features under a 
variety of modifications; for all true Pomotis are fishes with a 
small mouth, feeding on worms, while P. gulosus has a large 
mouth like Grystes and is a voracious animal living upon small 
fishes, which he chases with great energy. Again, Ceutrarchus 
has fins widely ditferent in their structure from those of P. gulo- 
sus; there being a large number of spinous rays in advance of 
the anal in Centrarchus proper and those genera mentioned above 
which have been finally separated from Centrarchus ; whilst P. 
gulosus has only three, like the true Pomotis. Notwithstanding 
these peculiarities I have been hesitating for a long time to con- 
sider P. gulosus as the type of a distinct genus, until I ascertained 
that there exist many species of this type in different parts of the 
country, all of which reproduce the essential peculiarities of P. 
gulosus under a variety of modifications. Upon a careful inves 
tigation of all the works in which American fishes are mentioned, 
I ascertained however that Rafinesque had already established a 
distinct genus for a species of this type described in his Lehthyo- 
gia Ohiensis under the name of Calliurus punctulatus. It is 
hardly surprising that this genus should have been overlooked by 
European ichthyologists and that it should even have escaped the 
notice of the authors of the great French Histoire naturelle des 
Poissons, for the fishes of the Ohio river have remained entirely 
unnoticed since Rafinesque, until Dr. Kirtland published his 10- 
teresting and highly valuable papers upon the fishes of Ohio, 10 
the Journal of the Natural History Society of Boston. Dr. Kurt 
land however, though the first author who has done full justice 
to the valuable contributions of Rafinesque to the Ichthyology ° 
the United States, does not mention the species described by 
Rafinesque, as Calliurus punctulatus, and so this genus has re- 
mained unnoticed until now. It has oecurred to me that 1 
Body oval, rather elongated, not compressed above. Dorsal long 
species from Huntsville is identical with Rafinesque’s Calliurus 
punctulaius. It is called there Black Perch or Goggle-eye- 
