..The fishes of Illinois . in head, bluntlypointed and somewhat decurved, projecting little beyond the mouth;mouth horizontal, inferior, tip of lower jaw as far in front of anterior nos-tril as that is in front of eye; length of maxillary to in head,reaching to anterior nostril; barbel usually rather less than diameter ofpupil; isthmus wide, its breadth equal to diameter of orbit. Teeth 4-4,with very narrow grinding surface; intestine 1 to 1. S times length of headand body; peritoneum black. Dorsal fin with 8 rays, set distinctly of ventrals, and about equidistant between tip
..The fishes of Illinois . in head, bluntlypointed and somewhat decurved, projecting little beyond the mouth;mouth horizontal, inferior, tip of lower jaw as far in front of anterior nos-tril as that is in front of eye; length of maxillary to in head,reaching to anterior nostril; barbel usually rather less than diameter ofpupil; isthmus wide, its breadth equal to diameter of orbit. Teeth 4-4,with very narrow grinding surface; intestine 1 to 1. S times length of headand body; peritoneum black. Dorsal fin with 8 rays, set distinctly of ventrals, and about equidistant between tip of snout and basebf caudal; longest dorsal ray to in head; anal rays 7; pectoralsabout f to ventrals; ventrals to vent. Scales S or 6, 38-47, 4 or 5; 14 to17 rows before dorsal; lateral line complete, nearly straight. No females with eggs found in our collections, which are few,and mostly taken in midsummer or after. Males with organs ap-parently well developed, but without tubercles, taken in the mid-dle of HYBOPSIS 165 An uncommon species in this state, its known localities beingone on the lower Kaskaskia, one on the upper Embarras in Colescounty, one on the Sangamon in Macon county, one on the Kick-apoo in Logan county, one on Spoon River in Fulton county, andfour on Rock River, in Lee and Winnebago counties. In northernIllinois it has been taken chiefly in swift water flowing over the state it is to be found from Lake Erie to the head-waters of the Tennessee, west to Arkansas and Iowa, and north tothe Saskatchewan River and to Calgary. HYBOPSIS AMBLOPS (Rafinesque)(big-eyed chub; silver chub) Rafinesque, 1S20, Ichth. Oh., 51 (Rutllus). , 179 (Ceratichthys hyallnus); J. & G., 214 (Ceratichthys); M. V., 64; J. & E.,I, 320; J., 62 (Ceratichthys); P., 75 (Semotilus); L., 19. Length 2 to 3 inches; a small but rather robust species, the body lessslender and more compressed and the eye larger than in H. dissimilis; depth to S . 2 in length, be
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Keywords: ., bookcentury1900, bookdecade1900, bookidcu31924, booksubjectfishes
