48 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IT 



Size much less than that of 8. vitreum. The largest specimens seen 

 by me were about fourteen inches in length. The accompanying figure 

 represents the stomach and pyloric cceca of one of these. 



Habitat. — Lake Erie, Ohio Eiver, and southward to Georgia. 



32. STIZOSTETHTUM (CYNOPERCA) OANADENSE, [G. E. Smith) 



Jordan. 



Sauger — Gray Pike— Sand Pike. 



fLucioperca canadensis, C. H. Smith, MSS, (1834). — Griffith's Cuvier's Animal King, 

 dom, X, 275. — Richardson (1336), Fauna Bor.-Am. Fishes, iii, 17. — De Kay 

 (1842), N. Y. Fauna, Fishes, 19.— Stoker (1846), Synopsis, 276.— Gunther 

 (1859), Cat. Fishes, i, 75.— Jordan (1877), Klippart's Report, 225. 



? Stizostedium canadense, Jordan (1876), Man. Vert. 225. — Jordan & Copeland 

 (1876), Check List, 136. 

 Ludoperca grisea, De Kay (1842), N. Y. Fauna, Fishes, 19. — Storer (1846), Synopsis, 

 276.— Gunther (1859), Cat. Fishes, i, 76.— Jordan (1874),Ind.Geol. Surv. 212. 



Stizostedium griseum, Milner (1875), Rept. U. S. Fish Com. 1872-3. — Jordan 

 (1876), Man. Vert. 225.— Nelson ( 1876), Bull. Ills. Mus. Nat. Hist. 36.— Jor- 

 dan & Copeland (1876), Check List, 136. 

 Ludoperca horea, .Gud. (1857), Proc. Acad. Nat. Sci. Phila. Nov. (notOkow or Horn Fish 

 of Richardson, which is S. vitreum). 



Stizostedion boreus, Grd. (1858), Pac. R. R. Survey, x, 31. 



Stizostedium ioreum, Jordan & Copeland (1876), Check List, 136. 



I have never seen a specimen of the Sauger with the opercular spines 

 exactly as represented in Smith's figure of his canadensis. 1 find, how- 

 ever, much variation in this respect, and I have seen specimens with 1, 

 2, 3, and 4 spines ; and also specimens with the two sides unlike. Until 

 it is known that there is a second species of Sauger in our waters difier- 

 iug from griseum by the constant presence of four opercular spines, it is 

 safest to unite griseum, and canadense. 



The types of Stizostedion horeus Girard are preserved in the United 

 States National Museum, and seem to be the common " Sauger", 8. 

 canadense. Part of Dr. Girard's description of this species is borrowed 

 from Richardson, and applies to 8. vitreum. 



Body most elongated, more terete than in Stizostethium proper, with 

 the back scarcely compressed, so broad that the lateral line may be 

 seen in a view from above, the back somewhat angulated as it de- 

 scends to the sides, the depth of the body 4^ to 5 in length. 



Head quite pointed, about 3^ in length, the slope of the profile greater 

 than in Stizostethium. Eye smaller, 5 to 5 J in head in adult; mouth 

 rather smaller, the lower jaw included j maxillary reaching to opposite 

 posterior margin of eye. 



