Jordmi and Evennann . — Fishes of North America. 3155 
pectoral 4-, ; ventral 44; u))per rays of caudal 34, lower rays 1,\; D. 13; 
A. 7 ; scales 29-9, 7 on caudal peduncle. Body deep, compressed, dorsal 
contour arched, its highest point at insertion of dorsal; caudal peduncle 
narrow and very deep; head small, pointed; interorhital space wide, 
slightly convex; eye large, a little nearer tip of snout than to posterior 
edge of opercle; mouth vertical; teeth in two series, the first in a single 
row, minute, flat, and pointed, the second in a villiform hand, much 
smaller and narrower than the first, brownish-colored, strongly curved 
backward; gill opening extending above base of pectoral a distance 
equal to diameter of pupil; gill-rakers on first arch 19, slender, the 
length of longest equal to half diameter of eye; intestinal tract slender 
and long; peritoneum black; scales on head and body large, 1 large, 
round scale on interorbital space, followed by 2, a row of 11 from the 
latter to first dorsal ray; 3 rows on base of caudal fin; base of dorsal fin 
short, 4^ in body, first ray shortest, the others graduated to the eighth, 
which is longest; ninth, tenth, and eleventh shorter; twelfth and thir- 
teenth longer; the abrupt shortening of the ninth, tenth, and eleventh 
rays makes a notch in the outline of fin; anal advanced, its origin under 
third ray of dorsal; first ray greatly enlarged and lengthened; second 
and third equally lengthened, but more slender, these three with their 
connecting membranes forming a half tube with a pointed end; other 
rays half the length of first; upper lobe of caudal rounded, 5 lower rays 
forming a verj’ long, blunt appendage; ventrals pointed, extending 
almost to tip of anal; pectoral sharply rounded; color yellowish olive, 
marked with black; during life there were 4 narrow, longitudinal orange 
bands, each extending along a row of scales on body; toji of head, and a 
median dorsal baud extending to caudal, dusky; a narrow, dusky baud 
on edge of lower jaw; 2 short, vertical bands bn snout; 6 upper rows of 
scales edged with black or dusky; a few black spots irregularly arraiiged 
on body above ventrals ; a large black spot at base of caudal, its color 
extending along upper edge of prolongation; a dark line extending along 
lower edge of caudal peduncle to end of lower caudal rays, the caudal 
extension rvith a light central portion bordered with black, the lower 
border wider; nnderpart of head aud belly without dark color; dorsal 
fin with black dots and lines; qiectorals, ventrals. and anal plain. 
Considerable variation in shape of fins and in color is shown among 
other male examples (cotypes, males and females, Xo. 6146, L. S. Jr. 
Univ. Mus.). In some the fins are low and short, the caudal ornament 
represented only by a slight Icngtheuiug of the lower rays. Among indi- 
viduals, apparently fully grown, there is every graduation from the 
undeveloped to the very long caudal extension. In every case the scales 
are conspicuously dark edged. In some examples black spots, ciowded 
together, form a more or less dark line from eye to caudal, while below 
this line are large, irregular black blotches. Others have no black spots, 
and the dark caudal patch has almost disappeared. 
The females have the fins low or short, and without sjiecial modifica- 
tions, the i)o.sterior edge of caudal ^-shaped, the upper i>art rounded, 
the lower ])oiuted, the scales dark edged; a nanow, indefinite, dark color 
baud usually present along median line of sides; the dark caudal patch 
