..The fishes of Illinois . ad, its depth 2 to 2 .5 in its length. Color dusky bluish-olive above; tinges of light purplish on sides as far down as lateral line;a faint plumbeous lateral band, somewhat more distinct towards end ofcaudal peduncle; a faint vertebral streak and a dark bar behind opercle;sides below lateral line greenish gray to silvery; belly silvery; dorsal finwith a distinct black blotch at base, between first and third rays; inbreeding males there is sometimes a broad but indistinct transversebar of dusky color crossing the fin about midway; other fins plain, or, atmost, with s
..The fishes of Illinois . ad, its depth 2 to 2 .5 in its length. Color dusky bluish-olive above; tinges of light purplish on sides as far down as lateral line;a faint plumbeous lateral band, somewhat more distinct towards end ofcaudal peduncle; a faint vertebral streak and a dark bar behind opercle;sides below lateral line greenish gray to silvery; belly silvery; dorsal finwith a distinct black blotch at base, between first and third rays; inbreeding males there is sometimes a broad but indistinct transversebar of dusky color crossing the fin about midway; other fins plain, or, atmost, with slight traces of dusky in spring males. Head large, every-where convex, broadly rounded above, to in length; width ofhead 1. 6 to 1. 8 in its length; interorbital space 2 .4 to 2 . 7 ; eye 4. 8 to 7 .1in head, usually more than 6 in adults; nose long, broadly and bluntlyrounded, 2 .7 to 3 .3 in head; mouth very large, terminal, oblique, tip ofupper lip at level of lower margin of pupil; maxillary about 2\ times eye,. Fig. 26Left branchial cavity of Scrnotihts atromaciilatus, with opercleremoved to show left pharyngeal arch in situ; also pharyn-geal jaws removed and viewed from front. reaching beyond anterior margin of orbit; jaws about equal; isthmusless than eye. Teeth extremely variable, — 4,1-0,4, 4,1-0,5, 4,2-1,5,4,2-2,5, 5,2-1,5, 4,2-2,4 in nine specimens examined by us; to times length of head and body; peritoneum pale, a verv littledusky forward. Dorsal fin with 8 rays, situated behind ventrals, equi-distant between front of eye and base of caudal; longest dorsal ray in head; anal ravs 8; pectorals short, reaching ^ to § to ventrals, to in head; ventrals short of vent in adults. Scales 10 or 11,rarely 9, 55 to 69, 5 to 7, considerably crowded in predorsal and scapularregions, about 35 rows before dorsal fin; lateral line complete, with astrong downward curve in front of ventrals. This is essentially a creek species, our frequen
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Keywords: ., bookcentury1900, bookdecade1900, bookidcu31924, booksubjectfishes
