FISHES— CYPRINIDAE—ALGANSEA FORMOSA. 
239 
The back and sides are of a metallic bluish black, intermingled on the lower half of the flank 
with a golden hue. The inferior surface is white, contrasting with the color of the back. The 
base of the fins is bluish grey, whilst their periphery exhibits an olivaceous tint. 
List of specimens. 
Catal. 
No. 
Cor. No. 
of teeth. 
No. of 
spec. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
192 
2750 
i 
Klamath lake, Oregon. 
1855 
Lt. R. S. Williamson.. 
Alcoholic. 
Dr. John S. Newberry. 
2. ALGANSEA OBESA, Grd. 
Spec. Char. —Head contained four times and a half in the total length. Eye rather small; its diameter entering n'early six 
times in the length of the side of the head. Posterior extremity of the maxillar bone corresponding to a vertical line drawn 
behind the nostrils. Anterior margin of the dorsal fin nearer the insertion of the caudal than the extremity of the snout. 
Insertion of ventrals nearer the base of the caudal than the extremity of the snout. Scales moderate, Bluish grey above; 
yellowish beneath; sides greyish. Fins greyish olive. 
Syn. —Algansea obesa, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 183. 
This is a very corpulent species, covered with scales of moderate development, and so far, the 
smallest in the genus. The depth is contained about three times in the length, the caudal fin 
excluded. There are eight longitudinal rows of scales between the origin of the ventrals and 
the lateral line, and fourteen rows above it to the anterior margin of the dorsal: in all twentv- 
three rows. The scales themselves are either somewhat longer than deep, or else as deep as 
long, anteriorly sub-truncated, rounded upon the remaining three margins, and provided with 
radiating furrows upon their posterior section only. The following is the formula of the fins : 
D2,9; A 2, 8; 0 7, 1, 9, 8, 1, 6; V 9 ; P 16. 
The color of the dorsal region is of a bluish grey ; the sides being greyish, whilst the abdomen 
is yellowish. The fins are greyish olive, darker at their base than upon their periphery. 
List of specimens. 
Catal. 
No. 
Cor. No. 
of teeth. 
No. of 
spec. 
Age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
193 
2751 
i 
Adult. 
Humboldt river.... 
1852 
J. S. Bowman. 
Alcoholic. 
J. S. Bowman___ 
194 
2752 
i 
-do- 
. ? . 
1853 
Lt. E. G. Beckwith. — 
_do. 
Lt. Beckwith. 
3. ALGANSEA FORMOSA, Grd. 
Spec. Char. —Head contained four times in the total length. Eye moderate sized; its diameter entering five times in the 
length of the side of the head. Posterior extremity of the maxillar bone corresponding to a vertical line drawn behind the 
nostrils. Anterior margin of dorsal fin equidistant between the extremity of the snout and the insertion of the caudal. 
Insertion of ventrals nearer the extremity of the snout than the base of the caudal. Scales moderate. Greenish brown above; 
yellowish or whitish beneath, sometimes with small scattered black spots. Fins greyish olive. 
Syn.— Algansea formosa, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 183. 
A very graceful and well proportioned fish as regards body and head. The latter is rather 
slender and conical, constituting the fourth of the total length, in which the greatest depth 
