362 
ZOOLOGY. 
tapering ; the anterior margin of the dorsal fin is nearer the extremity of the snout than the insertion of the caudal. Tip of 
pectoral reaching to the base of the ventrals; tip of ventrals overlapping the vent, not extending quite to the margin of 
the anal. Yellowish brown, with a silvery, superiorly dusky streak along the middle of the flanks. 
Syn. — Gobio gelidus, Grd. in Proc. Acad. Nat. Sc. Philad. VII, 1856, 188.— Ibid. Gen. Rep. Fishes, 248. 
Two specimens were obtained from Milk river. 
RICHARDSONIUS BALTEATUS, Grd. 
Steilacoom Killy. 
Plate LX, Figs. 1 — 4. 
Sp. Ch.—H ead forming less than the fifth of the total length. Snout sub-conical; jaws even; posterior extremity of 
maxillar hone extending to a vertical line drawn in front of the orbit. Eye large and circular, its diameter entering three 
times and a half in the length of the side of the head. Anterior margin of dorsal fin equidistant between the extremity of 
the snout and the fork of the caudal. Anal fin longer than deep, and about as long as the head. Caudal fin constituting 
about the fourth of the total length. Grayish black above; silvery white beneath. Fins unicolor. 
Syn. — Oyprinus (Abramis) balteatus, Richards. Faun. Bor. Amer. Ill, 1836, 301.— Storer. Synops. 1846, 160. 
Richardsonius bcdteatus, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 202.— Ibid. Gen. Rep. Fishes, 278. 
This fish is very abundant in the small fresh water lakes near Fort Steilacoom. It is readily 
taken with the hook and line, and seems disposed to run in “schools.’ ’ The flesh when cooked 
is soft and insipid, and as the bones are so numerous and troublesome it is rarely eaten. 
RICHARDSONIUS LATERALIS, Grd. 
Spotted Killy. 
Plate LX, Figs. 5—8. 
Sp. Ch.—H ead constituting the fifth of the total length. Snout sub-conical; jaws even; posterior extremity of the 
maxillary extending to a vertical line drawn behind the nostrils. Eye large and circular, its diameter entering nearly four 
times in the length of the side of the head. Anterior margin of dorsal fin a little nearer the extremity of the snout than the 
fork of the caudal. Anal fin deeper than long, and much shorter than the head. Caudal fin entering four times and a half 
in the total length. Blackish brown above ; metallic yellowish white beneath, with a black streak above the lateral line. 
Fins unicolor. 
Syn. — Richardsonius lateralis, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 202.— Ibid. Gen. Rep. Fishes, 279. 
This fish is very plentiful in the same localities as the last-mentioned species, of which it was 
taken by me to be a variety, or as simply differing in age. In habits, &c., it is precisely similar 
to the other. The colors given by Mr. Girard are those of fish which have been long in alcohol, 
and of course differ from those freshly caught. 
CHEONDA COOPERI. Grd. 
Vancouver Chub. 
Plate LXIII, Figs. 1—5. 
bp. Ch.— Body elongated, suh-fusiform in profile. Head contained a little short of five times in the total length. 
Snout thickish, sub-conical, overlapping somewhat the lower jaw ; posterior extremity of the maxillar bone extending to a 
vertical line drawn behind the nostrils. Eye well developed ; its diameter entering four times and a half in the length of 
the side of the head. Fins well developed. Upper regions reddish gray ; sides and belly yellowish white with a metallic 
reflect. 
Syn. — Cheonda cooperi, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 2 j7.— Ibid. Gen. Rep. Fishes, p. 294. 
This much resembles several other kinds of fish of the Territory, called generally “suckers,” 
“bony fish,” “carp,” “red fin,” &c., and, like them all, is considered poor food. It can easily 
