CENTRARCHIDA. i Al 
I supply that of lythrochloris, in allusion to the blood-red and pale-green 
coloration. 
Xenotis lythrochloris needs comparison chiefly with X. megalotis. The 
body is elongate proportionally, somewhat as in the species of Apomotis, 
but the profile is quite steep.’ The back along the base of the dorsal 
fin is unusually straight, not strongly bowed as in megalotis. The 
colors are different in life; there is more red on the cheeks and fins in 
X. lythrochloris, but the ground-color of the back is a decided olive- 
green with blue spots. The belly, as in megalotis, is orange. The mem- 
brane of the soft parts of the vertical fins in X. lythrochloris is bright 
orange-red. The spines are extremely short, the longest about equal to 
length of snout. The most available distinctive point is in the oper- 
cular flap, which is extremely long, longer than in megalotis or sanguino- 
lentus, and entirely black, without any trace of pale edging whatever, ex- 
cept at base. In megalotis, the flap is conspicuously edged with paler. 
X. megalotis abounds most in ponds and still deep places in the 
rivers. X. lythrochloris runs up the small brooks into places where it 
and Apomotis cyanellus are the only Centrarchine inhabitants, whence it 
often comes to adorn the urchin’s string in company with Semotilus 
corporalis, Catostomus teres, Campostoma anomala, and other * boys’ fish”. 
25. XENOTIS AUREOLUS, Jordan. 
? Pomotis macrochira, KIRTLAND (1839), Bost. Journ. Nat. Hist. iii, 469.—STorER (1846), 
Synopsis, 298 (not Jcthelis macrochira Raf.—=Lepomis nephelus Cope). 
Ichthelis macrochira, JORDAN (1876), Bull. Buff. Nat. Hist. Soc. 92; Manual Vert. 
236 (not of Raf.). 
Xenotis aureolus, JORDAN (1877), Bull. ix, U. S. Nat. Mus. —. 
Body oblong, rather heavy forward ; the forehead usually quite con- 
vex, but sometimes the profile straightish or almost concave; depth 
about 24 in lengtn; head 23; eye about as large as flap in adult, 4 in 
head; mouth moderate ; scales on cheeks rather large, in 5 or 6 rows. 
Fin-rays as in related species ; dorsal spines short, rather longer than 
in XY. lythrochloris, but scarcely longer than snout ; pectorals moderate ; 
veutrals elongate. 
Colors very clear and translucent, the young almost transparent, the 
adult lustrous, clear pale green above; s#des with much spotting of 
golden orange or brassy, the spots uumerous but not well defined, 
shading into the green; the orange predominating below; the belly 
clear orange; some blue spotting on sides, a purplish-red lustre on the 
sides in life, peculiar to this species. This disappears at death. 
