234 
U. S. P. E. E. EXP. AND SUEVEYS—ZOOLOGY—GENEEAL EEPOET. 
1. PIMEPHALES MACULOSUS, Grd. 
Spec. Char. —Body rather short, deep, and compressed; greatest depth equal to one-fourth of the total leDgth, whilst the 
head constitutes the fifth part of it. Eye moderate and circular; its diameter entering four times in the length of the side of 
the head. Angle of the mouth not extending as far as a vertical line drawn in advance of the orbit. Extremities of ventrals 
overlaping the vent, and reaching the anterior margin of the anal. Scales much deeper than long, and larger on the peduncle of 
the tail than anteriorly. Yellowish brown with black blotches. 
Svn. —Pimephales maculosus, Grd. in Proc. Acad. Nat. Sc Philad. VIII, 1856, 180. 
It is a stouter fish than P. promelas, both in body and head. The latter is almost round. 
The anterior margin of the dorsal is equidistant between the extremity of the snout and the 
last scales upon the base of the caudal fin. The origin of the ventrals is situated a little 
posterior to the anterior margin of the dorsal. The scales are larger also than in P. promelas; 
they are vertically sub-elliptical, much deeper than long. Upon a yellowish brown ground 
color there are large and irregular black blotches covering more than half the entire surface of 
the body. The fins are yellow upon their bases and tips, and black upon their middle. The 
external margin of the ventrals and pectorals being of a pure white. 
List of specimens. 
Catal. 
No. 
Cor. No. 
of teeth. 
No. of 
spec. 
Age. 
Locality. 
When col¬ 
lected. 
Whence obtained. Orig. 
No. 
Nature of 
specimen. 
153 
2729 
1 
Adult. 
Sluice of Arkansas river.... 
1853 
Lieut. E. G. Beckwith. 6 
Alcoholic.. 
2. PIMEPHALES FASCIATUS, Grd. 
Spec. Char. —Body anteriorly stoutish ; its depth being contained five times in the total length, in which the head enters four 
times and a half. Eye moderate and circular; its diameter entering somewhat more than four times in the length of the 
side of the head. Posterior extremity of maxillar bone not extending as far as a vertical line drawn in advance of the orbit. 
Extremities of ventrals stretching beyond the anterior edge of the anal. Scales deeper than long, elliptical. Brown, fasciated 
with black. 
Syn .—Pimephales fascialus, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 180. 
This species has the general aspect of P. maculosus, differing, however, from it chiefly by the 
proportional length of the head and depth of the body, and by the position of the ventrals, 
which are inserted under the anterior margin of the dorsal fin. The scales are smaller also. 
The ground color is brown, with transverse black fasciae. The dorsal fin is provided with 
two black spots, one anteriorly, the other posteriorly. The other fins being unicolor, with the 
exception of the pectorals, which are greyish upon their external margin. 
List of specimens. 
Catal. 
No. 
No. of 
spec. 
Age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
151 
1 
Adult. 
Yellowstone river. 
1853 
Col. A. Vaughan. 
Alcoholic.. 
Dr. F. V. Hayden. 
932 
2 
Young. 
Milk river, Missouri .... 
1853 
Gov. 1.1. Stevens. 
-do- 
Dr. Geo. Suckley. 
