344 
ZOOLOGY. 
entire orbit. Anterior margin of dorsal fin equidistant between the tip of the snout and the base of the caudal. Ground color 
grayish silvery above ; sides and belly yellowish orange ; dorsal fin spotted.”—G irard. 
Syn — Fario aurora, Grd. in Proc. Acad. Nat Sc. Philad. VIII, 1856, 218 .—Ibid. Gen. Rep Fishes, 1858, 308. 
Salmo aurora, Grd. MS. 
?? Red-char, Lewis & Clark. 
Two specimens of salmon, upon which Dr. Girard based the description of the present 
species, were obtained, in 1854, by Lieutenant Trowbridge, United States army, at Astoria, 
near the mouth of the Columbia. From the appearance of these fish I am inclined to the belief 
that they are immature, being the young of a species as yet unknown in the adult state. A full 
description of the specimens is contained in the general report on the fishes, P. B. E. Eeports, 
volume X. 
Dr. Girard has placed the present species under the genus Fario , (Valenc.,) the characters 
of which are appended in a foot-note.* 
SALMO CLAEKII, Eich. 
Clark’s Salmon. 
Syn.— Salmo Clarkii, Rich. F. B. A. Ill, 1836, 224.—Storer, Synop. 1846, 197 .—Herbert, Fish and Fishing of the U. S. 
Suppl. 1850,40. (Non Salmo Clarkii, Grd.) 
Fp. Ch.—(D rawn from Richardson’s description and Dr. Gairdner’s notes.) Dorsal profile nearly straight. Ventrals 
opposite to the middle of first doisal. Fissure of mouth oblique. Extremity of caudal nearly even. Both jaws armed with 
strong hooked teeth, a single row on each palate bone, and a double row on the anterior half of the vomer and on the 
tongue. The teeth are long, slender, and acute. Lingual teeth longest and most curved. An oblong plate on the isthmus 
which unites the lower ends of the bronchial arches, rough, with very minute teeth. Sixty-six vertebrae in the spinal 
column. 
The colors of the species, as given by Dr. Gairdner, are not retained in the foregoing list 
of specific characters, as from the marked existence of large red and purplish patches we infer 
that the specimens described were not in prime condition. Dr. Gairdner says : ‘ ‘ Back generally 
brownish purple-red, passing on the sides into ash gray, and into reddish white on the belly. 
Large patches of dark purplish red on the back. Dorsals and base of the caudal ash gray; end 
of caudal pansy purple. Back, dorsal, and caudal studded with small semi-lunar spots. A large 
patch of arterial red on the opercule and margin of the preopercule. Pectorals, ventrals, and 
anal grayish white, tinged with rose red.” The rays are given in the following formula : “Br. 
11; P. 12; Y. 8; A. 13; D. 11—0.” 
The specimens described by Sir John Bichardson were obtained by Dr. Gairdner from the 
Katpootl (Cathlapootl) river, a small tributary of the Columbia, emptying into the right side 
of the latter a short distance below Fort Vancouver. Eichardson named the species in honor 
of Captain Clark, the indefatigable explorer, and seems to consider it identical with Captain 
Clark’s dark variety of salmon trout, (which we think is the same as our S. Gibbsii.) In 
color, Eichardson says, “this species resembles the mykiss of Kamtschatka, and there is no 
very material discrepancy in the number of rays in the fins.” 
The same writer, in the addenda to the Fishes, page 308, notices some trout received from 
* Genus FAEIO, V a 1 e n c. 
“ Gen. Char.—P ossesses all the characters of the salmons, differing from the latter by the presence of only one row of teeth 
upon the shaft of the vomer. The rest of the bones forming the upper roof of the mouth being toothless.”—G irard. 
