Percoidea, or Perch-like Fishes 527 
with alternate bands of dark blue-green and orange-red, most 
exquisite in their arrangement. In the South, Hadropterus 
nigrofasctatus, the crawl-a-bottom of the Georgia rivers, is 
a heavily built darter, which Vaillant has considered the ances- 
tral species of the group. Still more swift in movement and 
bright in color are the species of Hypohomus, which flash their 
showy hues in the sparkling brooks of the Ozark and the Great 
Smoky Mountains. Hypohomus aurantiacus is the best-known 
species. 
Diplesion blennioides, the green-sided darter, is the type 
of numerous species with short heads, large fins, and coloration 
Fig. 415 —Green-sided Darter Diplesion blennioides Rafinesque Clinch River. 
Family Percide. : 
of speckled green and golden. It abounds in the streams of 
the Ohio Valley. 
The tessellated darters, Boleosoma, are the most plainly 
colored of the group and among the smallest; yet in the 
es 
oe 
La 
Fic. 416.—Tessellated Darter, Boleosoma olmstedi (Storer). Potomac River. 
delicacy, wariness, and quaintness of motion they are among 
the most interesting, especially in the aquarium. Boleosoma 
