960 FISHES—PERCIDZ. | 
Genus 70. STIZOSTEDIUM. Rafinesque. 
Stizostedion, RAFINESQUE, Ich. Oh. 1820, 23. 
Pomacampsis, RAFINESQUE, Ich Oh., 1820 (Perca nigropunctata, Raf.; an erroneously de- 
scribed or mythical species. ). 
Lucioperca, Cuv. and VAL., Hist. Nat. des Poissons, ii, 1838, 110 (Perca lucioperca L.- 
Tueioperca sandra, C. & VY). 
Sandrus, STARK, Elements of Nat. Hist., i, 1828, 465. 
Stizostedium, Cops, Proc. Acad. Nat. Sci. Phila., 1865, 82, 85 (amended orthography). 
Stizostethium, JORDAN, Ann. N. Y. Lye. Nat. Hist., 1877 (amended orthography). 
Centropomus, BLEEKER, 1877 ( Centropomus sandat, Lac. ; P. lucioperca L. is the first species 
mentioned by Lacepede in his genus Centropomus—not Centropomus of Cuvier and 
Gill— Centropomus undecimalis Lac., a West India species, having been by them se- 
lected as the type of Centropomus.). 
Cynoperca, GILL and JORDAN, Bull. U. 8. Nat. Mus., x, 1877, 45 (subgenus, based on 
Lucioperca canadensis, Hamilton Smith.). 
Mimoperca, GILL and JORDAN, Bull. U. 8S. Nat. Mus., x, 1877, 45 (subgenus, based on 
Perca volgensis, Pallas. ). 
Perca and Centropomus, sp. early authors. 
* Type, Stizostedion salmoneum, Rafinesque. 
Perches, with the body elongate, little compressed, and the premaxillaries and pala- 
tines provided with some large teeth, arranged in rows, the rest of the teeth uniform ; 
tongue toothless; head conical, elongate, depressed, partly covered with small ctenoid 
scales; preoperculum serrated ; operculum armed with one to twenty spines of varying 
size, the terminations of rib like elevations on the surface of the bone; dorsal fins sep- 
arated, the first with twelve to fifteen spines, the second with seventeen to twenty- 
three soft rays. This genus consists of about five species, abounding in the fresh waters 
of North America and Europe. They are, of course, carnivorous and voracious, but 
are everywhere highly valued for food. 
ANALYSIS OF SPECIES OF STIZOSTEDIUM. 
Dorsal fins well separated, the interspace between them more than the diameter 
of the eye; the distance from the base of the last spine of the first dorsal, and the first 
of the second equal to the space occupied by the last four to six spines of the first dor- 
sal; anal fin II, 12, longer than high; second dorsal I, 17 to I, 21; spines of the second 
dorsal and anal closely attached to the soft rays; last dorsal spine scarcely erectile, 
more or less firmly bound down by the membrane; canine teeth strong (American 
species. ). 
* Soft dorsal comparatively short (its base one-fourth shorter than that of spinous 
dorsal), and with about seventeen short rays; cheeks, opercles, and top of head more 
or less closely scaled; body depressed, subterete; size small; pyloric cceca forming two 
groups, the primary one of four, unequal, moderate, much shorter than the stomach; 
the secondary of few (1-3) rudimentary ones, which are sometimes atrophied. 
| CANADENSIS. 
** Soft dorsal rather long (one-sixth shorter than spinous dorsal), with about twenty 
soft rays; cheeks and upper surface of head nearly naked; body more compressed ; size 
large; pyloric cceca three, subequal, all along (about as long as stomach). 
