234 



U. S. p. R. R. KXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



1. PIMEPHALES MACULOSUS, Grd. 



Spec. Char. — Body rather short, deep, and compressed ; greatest depth equal to one-fourth of the total length, 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 verlioal line drawn in advance of the orbit. Kxtreniities 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. — rimeplmUs maculosus, Grd. in Proc. Acad. Nat. Sc Philad. VIII, 1856, 180. 



It is a stouter fisli than F. 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. 



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, faeciated 

 with black. 



gyn. — Pimephales fascialus, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 180. 



This species has the general aspect of P. maculosus, difiering, 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. 



