FISHES—PERCIDAE—STIZOSTEDION BOREUS. 
31 
latter are less regular than the former ; all being, however, wider than the stripe which follows 
the course of the lateral line. 
References to the figures .—Plate XI, fig. 1, represents Lairax chrysops , somewhat reduced in 
size. Fig. 2 is a scale from the dorsal region. Fig. 3, a scale from the lateral line. Fig. 4, a 
scale from the abdominal region. 
List of specimens. 
Catalogue num¬ 
ber.- 
No. of specimens. 
Locality. 
When collected. 
Whence obtained. 
Original number. 
Nature of speci* 
mens. 
Collected by— 
383 
2 
St. Louis, Missouri_ 
1854 
Dr. Engelman_ 
Alcoholic_ 
Dr. Engelman. 
384 
1 
New Orleans, Louisiana .... 
1853 
Lieut. Couch__ 
25 
..do. 
Lieut. Couch - 
STIZOSTEDION, Rafin. 
Gen. Char. —Body elongated, slender, sub-cylindrical, slightly compressed. Head well developed. The preopercle is den¬ 
ticulated or serrated upon its edge ; a flattened spine or two, towards the upper region of the opercle. Mouth large ; jaws 
sub-equal. Canine teeth upon the jaws, front of vomer 1 ) and palatine bones. Tongue smooth. Cheeks and opercular 
apparatus entirely or partially scaly. Branchial apertures continuous under the throat. Two dorsal fins entirely separated ; 
anterior one spinous; anal fin without spiny rays Yentrals inserted posteriorly to the base of pectorals. Caudal fin pos¬ 
teriorly crescentic. Scales of moderate development, strongly pectinated, and rough to the touch. 
Syn. — Stizosledion, Rafin. Ichth. Ohiens. 1820, 23. 
Lueioperca, Cuv. R5gn. Anim. 2d ed. II, 1829. 
It is to he regretted that such a handsome name as Lueioperca should he superceded by that 
of Stizostedion. 
This genus includes fishes of voracious habits, and growing sometimes to a very considerable 
size. Its species are not numerous, although widely spread over the cold part of the temperate 
zone. 
The common appellations of pike-perch, salmon, sandre, &c., are applied to the various species 
which are brought to our markets, and served upon our tables. 
STIZOSTEDIOX BOREUS, Grd. 
Okow, or Horu Fish. 
Plate XI, Figs. 5 —8. 
Spec. Chab. —Body slender, elongated, and sub fusiform. Snout conical; mouth deeply cleft; posterior extremity of 
maxillary bone extending to a vertical line drawn posteriorly to the orbit. Scales on cheek and opercle not deciduous, 
larger upon the opercle than upon the cheek. Insertion of ventral fins situated posteriorly to the base of pectorals, and 
somewhat anteriorly to the origin of first dorsal. Posterior margin of caudal crescent shaped. Anus situated opposite the 
origin of the second dorsal fin. Yellowish or olivaceous, spotted with black. 
Syn. — Lueioperca borea, Grd. Poc. Acad. Nat. Sci. Philad. November, 1857. 
2“?’ Sf 23 ’ iR ichards. Faun. Bor. Amer. HI, 1836, 14. 
Horn Fishy fur traders, J 1 1 
This species, though closely allied to its congeners, is nevertheless distinguishable by the 
gape of its mouth, which is proportionally greater, since the posterior extremity of the maxil- 
