274 REPORT OF NEW: JERSEY STATE MUSEUM. 
I have no examples of this fish, except one in the collection of 
the Academy of Natural Sciences of Philadelphia, which was pro- 
cured in the Philadelphia market. It may have been taken some- 
where on the New Jersey coast, though there is no evidence to 
prove this. 
Coryphena hippurus Bean, Bull. Am. Mus. N. H., IX, 1897, p. 
3263. 
Coryphena leseurti Abbott, Geol. N. J., 1868, p. 811. 
Family APHREDODERID£'. 
The Pirate Perches. 
Body oblong, elevated at base of dorsal, and compressed behind. 
Caudal peduncle deep. Head thick, depressed and profile con- 
cave. Mouth moderate, somewhat oblique, lower jaw projecting, 
and maxillary reaching anterior border of eye. ‘Teeth in villi- 
form bands on jaws, vomer, palatines and pterygoids. Premaxil- 
laries not protractile, and maxillaries small, without evident sup- 
plemental bone. Preopercle and preorbital with free edges 
sharply serrate. Opercle with spine. Bones of skull somewhat 
cavernous. Gill-membranes slightly joined to isthmus anteriorly. 
Gills 4, a small slit behind fourth. Gull-rakers tubercle-like, den- 
tate. Pseudobranchiz obsolete. Lower pharyngeals narrow, 
separate, with villiform teeth. Branchiostegals obsolete. Sides 
of head scaly. Scales moderate, strongly ctenoid, adherent. 
Lateral line imperfect or wanting. Dorsal fin single, median, 
high, spines III or IV and rapidly graduated, first very short. 
Anal small, with III slender spines. Ventrals thoracic, without 
distinct spine, and rays usual 7. Caudal rounded. Vent always 
anterior, its position varying with age from just behind ventrals 
in young to below preopercle in adult. Air-vessel simple, large, 
adherent to walls of abdomen. Vertebree 14 + 15. Pyloric cceca 
about 12. - 
A single genus with one species confined to the United States. 
1 Percopsis guttatus Agassiz has been credited to the Delaware River by 
writers with reference to its capture by Dr. Charles C. Abbott. However, 
Dr. Abbott tells me that he has never taken this fish in the Delaware, and 
also that he has never seen a specimen from any part of the same river sys- 
tem. The confusion he attributes to the remark which he made that Baird 
had reported it from Easton, Pa. 
