298 REPORT OF NEW JERSEY STATE MUSEUM. 
Genus PErca Linnzus. 
The Perches. 
Perca flavescens (Mitchill). 
PLATE 44. 
Perch. Peerch. River Perch. Yellow Perch. Yellow Ned. 
Head,,2)5,depth, 3245 4D.) X1TI-1, 414, 5. Av LIL, 7,00; seales 
50 in lateral line to base of caudal; 6 scales obliquely back from 
origin of spinous dorsal to lateral line; 13 scales between origin 
of spinous anal and lateral line in a vertical series; mandible 2 
in head; third branched dorsal ray 21%4; third anal spine 3%; 
first anal ray 24%4; upper caudal lobe 1*/,; least depth of caudal 
peduncle 3345; pectoral 17%; ventral 17%. Body long, com- 
pressed and back elevated at origin of dorsal, which is deepest 
part of body. Caudal peduncle a little long, compressed. Head 
large, elongate, and muzzle robust. Snout long, convex. Eye 
circular, anterior. Mouth moderate, oblique, and mandible 
slightly protruding. Lips rather thick and fleshy. Maxillary 
falling a little short of posterior margin of pupil and its distal 
expansion about 114 in orbit. Villiform teeth in jaws and on 
vomer and palatines. Interorbital space rather broad and only a 
trifle convex. Nostrils a little separated. Opercular spine sharp, 
2 smaller denticles below. Preopercular margin serrate, retrorse 
below. Gill-rakers m1 2 + 12 1Vv, lanceolate, longest about 1% 
in pupil. Scales on predorsal region, breast and cheeks small, in 
6 series on latter. Shoulder-girdle, opercle and top of head well 
striate. Lateral line of simple tubes, high. Spinous dorsal in- 
serted a little behind origin of pectoral, and highest about fourth 
spine. Rayed dorsal inserted nearer base of caudal than origin 
of pectoral, anteriorly highest. Anal inserted a little posterior 
to origin of second dorsal or midway between base of seventh 
dorsal spine and base of caudal, spines graduated to third, which 
is longest. Rayed anal deepest anteriorly. Caudal emarginate, 
upper lobe longer. Pectoral nearly half way to anal. Ventral 
inserted about opposite base of fourth dorsal spine, and reaching 
