494 NEW YORK STATE MUSEUM 



mizostedium vitreutn, JORDAN & GILBERT, Bull. 16, IT. S. Nat. Mus. 525, 1883. 

 Lucioperca vitrea EUGENE SMITH, Proc. Linn. Soc. N. Y. 1897, 38, 1898. 

 mizostedion vitreum MEEK, Ann. N. Y. Ac. Sci. IV, 314, 1888; BEAN, Fishes 



Penna. 127, color pi. 13, 1893; EVERMANN and KENDALL, Kept. U.S.F.C. 



for 1894, 601, 1896; JORDAN & EVERMANN, Bull. 47, U. S. Nat. Mus. 



1021, 1896, pi. OLXIV, fig. 433, 1900; BEAN, Bull. Am. Mus. Nat. Hist. 



IX, 364, 1897. 



The pike perch belongs to the genus Stizostedion, which 

 has been distinguished from the saugers by the structure of its 

 pyloric caeca, which are three in number, nearly equal in size, 

 and about as long as the stomach, and also by the presence 

 of 21 soft rays in the second dorsal, while the saugers have 18. 

 It may be remarked that all of these characters are more or less 

 variable. The S. vitreum has the body long and moderately 

 deep, its depth varying with age and equaling from one sixth 

 to one fourth of the total length without caudal; the length of 

 the head is contained in the same standard four and two thirds 

 times; the eye is moderate, about two thirds as long as the snout 

 and a little more than one sixth of the length of the head; the 

 lower jaw projects slightly; the maxilla reaches to beyond the 

 pupil; the cheeks and opercles are more scaly than in the saugers; 

 the soft dorsal is nearly as long as the spinous; length of long- 

 est dorsal spine about half the length of head. D. XIII, I, 21; A. 

 II, 12 to 13. About 90 scales in lateral line, 10 above and 19 

 below. The pectoral reaches to below the 10th spine of the dor- 

 sal; it is as long as the ventral and one half the length of head; 

 the vent is under the fifth ray of the second dorsal. 



Color olivaceous, mingled with brassy; sides of the head ver- 

 niieulated; the dorsals, caudal and pectoral with bands; those of 

 the dorsals and caudal not continuous; sides with about seven 

 oblique dark bands, differing in direction; a jet black blotch on 

 the membrane behind the last spine of the dorsal. 



The pike perch has received a great many common names. One 

 of the most unsuitable is " Susquehanna salmon," which is used 

 in Pennsylvania. In the eastern states the species is styled the 

 perch pike or the pike perch, glasseye and wall-eyed pike. In 

 the Great lakes region it is known as blue pike, yellow pike, green 

 pike and grass pike. In the Ohio valley and western North Caro- 



