FISHES OF PENNSYLVANIA. 49 

silvery in color, and the fins unspotted. The body is long and slender. 
This fish is most common in the Great Lakes and in the channels of 
large streams, and does not run into small brooks. It is a ready biter, 
and is caught in large numbers by hook fishing. It is useful as bait. 
66. Hybopsis amblops (Rarinesque). 
The Silver Chub. 
The silver chub has a moderately elongate, but thick body, whose greatest depth 
equals one-fifth of the total length without the caudal, and is not much less than the 
length ofthe head. The caudal peduncle is slender, its least depth one-half of the 
greatest depth of body. The head is short, its length two-ninths of the total without 
the caudal. The snout is short, blunt, nearly vertical, rounded, its length three- 
fourths diameter of eye. The eyeis large, placed high, its long diameter three-eighths 
length of head. The mouth is small, terminal, placed low, nearly horizontal, the 
maailla reaching to below tront of eye and provided with a slender barbel one-third 
as long as the eye. The dorsal origin is over the twelfth scale of the lateral line; the 
base of the fin is one-half as long as the head ; the longest ray is one-fifth of the total 
without caudal, and nearly as long as the head; the last ray is one-half as long as 
the longest. The ventral origin is under the dorsal origin; the fin reaches almost 
to the vent. The anal origin is under the twenty-third scale of the lateral line ; the 
anal base is one-half as long as the head; the longest ray is as long as the head with- 
out the snout, and the last ray is a little more than one-half as long as the longest. 
The caudal is large and well forked. The pectoral base is below the median line of 
the body; the fin is as long as the head without the snout. The laterai 
line has a very short downward curve near its origin and is straight and 
median in) the rest’ of its course. D. iii, 7; A. i 7; V. 8; P. 18+ scales; 
6-38-4; teeth, 1, 4-4, 1 (sometimes 1, 4-4, 0). In spirits the upper parts are pale 
brown, the lower parts lighter, the belly yellowish. A plumbeous lateral stripe, 
continued on the head and around the snout. The fins are all pale. In life the 
upper parts are greenish, and the silvery median band overlies dark pigment. 
Males without tubercles and red coloration in breeding season. The specimen de- 
scribed, No. 36,769 United States National Museum, from French Broad river, Ten- 
nessee, is about three inches long. 
The silver chub or big-eyed chub inhabits the Ohio and Mississippi 
valleys, and is common southward to Alabama. It reaches a length of 
four inches. The color is greenish; sides with a dark band, overlaid by 
sliver, extending forward around the snout. 
The big-eyed chub, as its name implies, has a very large eye, which is 
one of its distinguishing features. It is said that the male has not the 
red fins and the tubercles which are found in the males of so many of 
the minnows. In the tributaries of the Ohio river this chub prefers 
sandy or gravelly bottoms and river channels. It is not common in the 
small streams. 
67. Hybopsis kentuckiensis Rarivesquz. . 
The Horned Chub (Figure 40.) 
The horned chub has a stout and rather short body, its greatest depth nearly equal 
to length of head and one-fourth of total length without caudal. '’he snout is long 
and obtuse, its length rather more than one-third length of head, and nearly twice 
4 FISHEs. 
