314 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY—GENERAL REPORT. 
pectorals are small and lanceolate. The rays of all the fins are more or less branched or bifur¬ 
cated ; their formula reads : 
Br. 12 : 12 ; D 13 ; 0 ; A 13; 0 7, 1, 9, 8, 1, 6 ; V IT; P 13. 
The anterior two rays in the dorsal fin are rather rudimentary, and so is the anterior one in 
both the anal and the ventrals. 
The scales are small, though not of the smallest kind in the genus. Their form varies 
according to the regions where observed : on the dorsal region they are sub-elliptically elongated, 
broader anteriorly than posteriorly ; in the lateral line, though similarly elongated, they are 
narrow and rather pointed anteriorly, and broad and rounded posteriorly; on the abdominal 
region they are deeper than long and vertically sub-elliptical. Their central portion is cellular 
in those of the dorsal and abdominal regions (figs. 2 & 4), whilst the concentric stria are 
obliterated posteriorly in those of the lateral line (fig. 3). 
This species is almost unicolor ; the back is silvery grey, whilst the sides are of a pure silvery 
hue and the belly yellowish white. The body is indistinctly speckled with black ; black spots 
of a more conspicuous character are observed upon the dorsal and caudal fins, also at the end of 
the tail. The inferior fins are greyish upon their base, and olivaceous towards their margins. 
The specimen figured and described was collected by Dr. Newberry, in Klamath river, Oregon. 
References to the figures .—Plate LXXI, fig. 1, represents Fario gairdneri, size of life. 
Pig. 2 is a scale from the dorsal region, midway between the lateral line and the dorsal fin. 
Fig. 3, a scale from the lateral line. Fig. 4, a scale from the abdominal region, midway be¬ 
tween the lateral line and the insertion of the ventral fins. Figs. 2—4 are magnified 
views. 
List of specimens. 
Ca.tal. 
No of 
Locality. 
When i Whence obtained. 
Nature of 
Collected by— 
No. 
spec. 
collected. 
specimen. 
578 
i 
Klamath river, Oregon.. 
1855 ^ Lt. R. S. Williamson_ 
Alcoholic.. 
Dr. John S. Newberry... 
5. FARIO CLARKII, Grd. 
Plate LXXI, Figs. 5—8. 
Spec. Char.— Body sub-fusiform ; head well developed, forming the fifth of the total length. Maxillary slightly bent, 
extending to a vertical line drawn inwardly to the posterior rim of the orbit. Jaws equal. Anterior margin of dorsal fin a little 
nearer the extremity of the snout than the insertion of the caudal fin. Back bluish grey ; upper surface of head blackish grey ; 
sides silvery grey ; fins ash grey; dorsal and caudal spotted. Upper regions of head and body studded with irregular black spots 
or specks. 
Syn. —Sa'mo clarkii, Richards. Faun. Bor. Amer. Ill, 1836, 224.— Storer, Synops. 1846, 197. 
Fario clarkii, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 219. 
The profile of the body is fusiform ; the head is sub-conical and proportionally well developed, 
forming about the fifth of the total length. The body itself, though compressed as usual in this 
genus, is rather full, and the sides sub-convex instead of flattened. The mouth is moderately 
cleft; the jaws being even anteriorly and the posterior extremity of the maxillary extending to 
a vertical line passing inwardly to the posterior rim of the orbit. The teeth are acute and 
conical, largest on the tongue ; those on the lower jaw (dentary) are nearly equal in size, the 
