1. 8ALM0. 123 



illary reaching a vertical line drawn immediately behind the orbit. 

 Anterior margin of dorsal fin a little nearer the extremity of the 

 snout than the base of the caudal fin. Body, dorsal, adipose, and 

 caudal fins dotted with black. Caudal emarginate. {Girnrd.) 



A non-migratory Trout from the Missouri ; the specimens from 

 12 to 13 inches long were taken just below the falls of that river. 



49. Salmo virginalis. 



Salar virginalis, Girard, Proc. Acad. Nat. Sc. Phiiad. 1856, p. 220 ; 

 and U. S. Paeif. Jt. R. Exp. Fish. p. 320, pi. 73. figs. 1-4. 



A non-migratory Trout, from Utah Creek, upper waters of the 

 Eio Grande del Norte, which appears to be very similar to S. fario ; 

 the description does not contain any distinctive characters. 



50. Salmo namaycusli. 



Salmo namaycush, Pe7in. Ai-ct. Zool. ii. p. 139 ; Introd. p. 141 ; Rich- 

 ards. Faun. Bor.-Amer. iii. p. 179, pi. 79 & pi. 85. fig. 1 ; Kirtland, 

 Rep. Zool. Ohio, p. 195, and Rost. Journ. Nat. Hist. 1842, iv. p. 25, 

 pi. 3. fig. 2 5 Agass. Lake Super, p. 331. 



aniethystinus, Mitch. Journ. Acad. Nat. Sc. Phiiad. 1818, i. 



p. 410 ; Dekay, New York Faun. Fish. p. 240, pi. 76. fig. 241 

 ^Richards, cop.) ; Storer, Synops. p. 193. 



Salar namaycush, Cuv. & Val. xxi. p. 348. 



B. 11-12. D. 13-14. A. 12. V. 9. L. lat. 220. 



Body rather stout, head very large, about two-sevenths of the total 

 length (vdthout caudal) ; bones of the head firm and strong. Prse- 

 operculum very short, without lower limb ; suboperculum very broad, 

 two-thirds as broad as long ; the posterior point of junction of oper- 

 culum and suboperculum is much nearer to the upper end of the gill- 

 opening than to the lower anterior angle of the suboperculum. 

 Maxillary strong, but narrow, with the supplementary bone much 

 projecting beyond its hinder extremity ; it extends far beyond the 

 hind margin of the orbit in old examples. Jaws equal or subequal 

 in length. Teeth strong, those on the vomer persistent throughout 

 the life of the fish, and in a single series*. Fins well developed; 

 caudal fin deeply forked, the outer rays being nearly thrice as long 

 as the inner ones. 



Inhabits all the great lakes between the United States and the 

 Arctic Sea — non-migratory. 



The above characters are taken from the specimen described and 

 figured by Richardson. 



Salmo confinis, Dekay, New York Fauna, Fish. p. 239, pi. 38. 

 fig. 123, would appear to differ from S. namaycush in having the 

 caudal fin much less emarginate ; this, however, requires confirma- 

 tion. This fish is said to be the " well-known " Lake-Salmon or 

 Salmon Trout of the State of New York. 



* Richardson desci-ibes the vomerine teeth as disposed in a double series, pro- 

 bably thinking that one-half of the vomer had been cut away. But this is not 

 the case, and those teeth form a single series only. 



