148 KEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



and the black markings very apparent. This sahnon is named in honor 

 of W. J. Warren, esq., the Secretary of the^ NorthNvestern Boundary 

 Commission, as a slight acknowledgment of the great and oft-repeated 

 kindness with which he has facilitated the operations of the naturalists 

 of the expedition. 



Except the word "trout," on the invoice, Dr. K. has left nothing re- 

 corded upon the habits of this fish. 



35. SALMO BAIRDII, Suckley. 



BAIRD'S RIVER TROUT j RED-SPOTTED ROCKY MOUNTAIN TROUT. 



Syn. — Salmo hairdti, Suckley, Notices of New SiJecies N. A. SalmonidiB, N. Y., 

 Jiuie, 1861. 



Sp. Ch. — Drawn from two skins of adults in the Smithsonian collec- 

 tion, one sent by Dr. Kenneiiy, the other supposed to have been sent 

 by Lieutenant MuUan, U. S. A. Head contained about five times iu 

 total length -, snout having a deep notch between the extremities of the 

 premaxillaries, receiving a conical fleshy protuberance that projects up- 

 ward fi'om the chin. Teeth strong, hooked, and very uniform in size ; 

 two rows on the tongue ; from two to four on the front of ihe vomer ; 

 none on its shaft. [In one of the specimens examined, a single accidental 

 small tooth was found on the shaft of this bone ; on the other, none.] 

 Sides of the body beautifully spotted with rose-colored spots, of the 

 size of small peas, of which there are numerous rows. Nostrils double. 

 Tail broad, and but moderately lunated. Scales small. Anterior rays of 

 the pectorals, veutrals, and anal, broad, and the skin upon them colored 

 yellowish-red as in S. fonUnalis, Attains the weight of ten or twelve 

 pounds. 



Diagnosis. — This trout being a red-spotted fish, is not likely to be con- 

 founded with any species west of the Rocky Blountain divide, except 

 the S. camphelli and 8. parlcel. From the former it may readily be dis- 

 tinguished by the great number, separation, and regular roundness of 

 the red spots, and by lacking the cream-colored spots on the back, and 

 also below the line of red spots which the chcwagh fS. campbellij has. 

 The tit-like flesh protuberance at the chin and corresponding notch 

 above are also wanting in the latter species. From IS. parJtei, it may 

 be kno^Ti by lacking the pale-green spots on the back, and by its 

 smaller head. 



Hab. — Clarke's Fork of the Columbia, and its tributaries. This beau- 

 tiful species, a specimen of which Dr. Kennerly obtained in September, 

 1860, at Camp Kishenehn. It was caught in a mountain torrent, coming 

 down from the main divide of the Rocky Mountains, and emi)tying into 

 the Flathead River. At the same place several others were killed, ap- 

 parently working up to spawn. Upon examination the fish soon proved 

 to be undescribed. Its size and beauty induced the writer to name it 

 after Spencer F. Baird, of the Smithsonian Institution. 



