New Species of Fishes. 277 
HypARGIRA LIMI. 
Plate II. fig. 4. 
Head, conic-cylindrical, smooth; upper jaw 
slightly recurved near the end; lower jaw more 
prominent; mouth somewhat diagonal; operculum 
with a membranous edge, extending to the origin of 
the pectoral fin. 
Body, uniformly cylindric, fusiform, slightly com- 
pressed behind the dorsal and anal fins; destitute of 
any prominent marking. Back, gibbous; abdomen, 
rectilinear. 
Dorsal fin quadrangular, otlónig, twice the length 
of the anal fin, 13 rayed, each minutely dotted, or 
lineated transversely. Caudal fin circular, diapha- 3 
nous, 14 rayed, each ray transversely and minutely 
lineated. Anal fim 10 rayed, situated beneath the 
posterior half of the dorsal. Ventral fin small, acute, 
extremity reaching the vent. Pectoral fins oval, ori- 
gin oblique. 
Scales rather large, sub-rhomboidal. 
Color. Dark olive, irregularly waved with fus- 
cous; abdomen free from the olive; an irregular 
transverse black band on the body, near the base of 
the caudal fin. 
Length, from two to three inches. 
Ossrrvations. I have met with this species only 
in the heads of Yellow Creek, in the village of Po- 
land, Trumbull Co., Ohio. It uniformly dwells in 
soft mud, and is sometimes found in great numbers 
in excavating springs and ditches. Like the other 
members of this genus, it is very tenadis of life. 
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