Fishes of ilio. > an 
the upper edge of this band, runs- ae lateral line. 
Above this, a golden parallel band narrower than the 
darker colored ; from the anterior portion of the head, 
along the dorsal ridge, a narrow band, similar to that 
last spoken of. When the fish is swimming, the 
three bands give it a very pleasing appearance. 
Length of the head about one fifth the length of the 
fish; the top of the head darker colored than the rest 
of the fish, flattened. Jaws destitute of teeth; the 
upper jaw the longer, semi-circular; lip corrugated ; 
the lower jaw elevated to a point in its middle, form- 
ing a triangle. Eyes moderate in size; pupils black ; 
irides golden. Gfill-covers silvery, with golden re- 
flections. Scales on the body small; nine scales in 
an oblique line from the origin of the dorsal to the 
lateral line. 
The Dorsal fin arises just in front of the ventrals ; 
brownish ; transparent ; higher than long. 
The Pectoral fins yellowish; arising on a line 
with the posterior angle of the gill-covers. 
'The Ventrals, of the color of the abdomen, are sit- 
uated under the middle of the dorsal fin. 
The Anal is situated just in front of the caudal 
fin ; its length equal to one third its height. 
The Caudal fin is forked. 
The fin rays are as follows: D. 13; P. 10; V. 
STAT; O. 18. 
Hyprarcira. Le Sueur. 
Generic characters. Ventral fins 6 rayed ; teeth 
in the jaws and throat ; those of the jaws conic and 
