FISHES—SALMONIDAE—FARIO CLARKII. 
3J5 
rest do not materially differ from each other. The eye is large and. circular, its diameter being 
contained about four times in the length of the sides of the head, exactly once in advance of its 
anterior rim, for, the snout is blunt and rounded off. The upper part of the opercle is narrow, 
gradually widening towards the sub-opercle, which is largely developed and almost as large as 
the opercle ; the longest diameter of the two being nearly at right angle with one another. 
There are eleven flattened branchiostegal rays. 
The anterior margin of the dorsal fin is situated a little nearer the extremity of the snout 
than the base of the caudal fin. The fin itself is a little higher than long, composed of fifteen 
articulated rays, the anterior one being a mere rudiment, whilst the others are branched and 
well developed The adipose is slender and situated opposite the posterior portion of the anal, 
but extending further hack. The caudal is furcated or rather concave posteriorly; the anal 
is shaped like the dorsal, though smaller. The ventrals are not preserved upon the specimen 
before us ; even their insertion has been carried away by the rupture of the abdomen, but on 
specimens from Fort Dallas their insertion is nearly opposite the anterior third of the dorsal fin. 
The pectorals are rather small, and inserted towards the inferior part of the thorax ; the upper 
two rays are the largest, the others diminish gradually towards the inferior edge of that fin. 
Br. 11: 11 ; D 15 ; 0 ; A 13 ; C 12, 1, 8, 7, 1, 10 ; V ? ; P 14. 
The scales are proportionally well developed without being large ; they are irregular in their 
outline, sub-circular, longer than deep above the lateral line and nearly as deep as long below 
it, and imbricated for nearly the third of their surface. The lateral line takes a straight course 
along the middle of the flanks. 
The ground color of the upper regions is bluish grey, with a purplish reflection ; the sides are 
silvery grey and the abdomen white. The upper surface of the head is black; the dorsal region 
above the lateral line is studded with irregular black spots and specks, extending likewise to 
almost the entire surface of the dorsal and to the base of the caudal. Along the tail they are 
also observed a little way beneath the lateral line. The specimen figured and described still 
exhibits traces of the patches or transverse bands peculiar to the immature fish throughout this 
family. 
This species was taken in Catlapootl river, a tributary of the Columbia, on the 2d of August, 
1853, by Dr. J. G-. Cooper. Two specimens, which we refer to the same species, were collected 
by Dr. Geo. Suckley at Fort Dalles, on the Columbia river. They are smaller still than the 
one just described and figured ; the lateral bands and patches are more distinctly marked, whilst 
the spots or specks are much less distinct. 
References to the figures .—Plate LXXI, fig. 5, represents Fario clarldi, size of life. Fig. 6, 
a scale taken from the dorsal region. Fig. 7, a scale from the lateral line. Fig. 8, a scale 
from the abdomen. Figs. 6—8 are magnified. 
List of specimens. 
Catal . 
No. 
No of 
spec. 
Locality. 
When 
collected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
581 
2 
Fort Dalles, Col. river... 
1853 
Grov. I. I. Stevens... 
Alcoholic • • 
Dr. frfin. Siip.klfiy ftT ttf > 
582 
1 
Catlapootl river. 
1854 
Dr. Jas. G. Cooper. 
.do. 
Dr. Jas. G. Cooper. 
