FISHES OP LAKE SUPERIOR, 295 



also in those of Michigan : the preoperculum is denticulated on its 

 whole circumference ; the interoperculum and the suboperculum are 

 equally crenulated or denticulated towards their union, upon the 

 third part at least of their extent. The lower margin of the sub- 

 operculum is undulated. The suprascapular bone has fine serra- 

 tures ; the scapular and the humeral are entire. According to Dr. 

 Richardson the crenatures of the margin of the interoperculum 

 are scarcely perceptible, and the suboperculum smooth and straight. 

 The suprascapular should be smooth, like the scapular and humeral, 

 whilst the figure of the Histoire Naturelle des Poissons represents 

 these three latter bones as serrated. This shows great variations in 

 these parts. 



The following is the formula for the rays of the fins, as we 

 counted them in our specimens : 



Br. 7 ; D. XIV-II, 19 ; A. II, 13 ; C. 5, L, 8, 7, 1., 4 ; V. I., 

 5 ; P. 15. 



When this fish is young, until it reaches a length of three to four 

 inches, the head resembles still more that of the pike than when full- 

 grown, the snout being then very depressed ; but the teeth are all 

 uniform. However, even at this epoch, the whole of its physiog- 

 nomy reminds us so much of the species described above that we 

 could not hesitate an instant for its determination. The black mar- 

 blings stand out more distinctly from the ground of the color than 

 in the full-grown ; they unite in groups and constitute irregular and 

 vertical zones. Dr. Dekay's Lucioperca grisea is also founded upon 

 young specimens of the common pike-perch. 



Grystes fasciatus, Agass. 



CiCHLA FASCiATA Lesu. Joum. Ac. N. Sc. Philad. 1822, II., 

 21Q. — Richards. Fn. Bor. Amer. 1836, III., 23. 



CiciiLA MINIMA and Ohioensis Lesu. 1. c. pp. 218 and 220. 



Centrarchus fasciatus Kirtl. Best. Journ. N, H, 1845, v. 28. 

 PI. 9, f. 1. 



Centrarchus obscurus Bekay N. Y. Fauna 1842, 30, PI. 1, 

 f. 48. 



