26 
U. S. P. R. R EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
List of specimens. 
Catalogue number. 
No. of specimens. 
Sex and age. 
Locality. 
When collected. 
Whence obtained. 
Original numbers. 
Nature of specimens. 
Collected by— 
446 
1 
Young. 
Eagle Pass. 
1853 
Maj. Emory__ 
Alcoholic. 
A. Schott_ 
447 
1 
__ do. 
San Felipe, Texas_ 
1851 
Col. J. D. Graham_ 
_do..-- 
John H. Clark. 
448 
5 
Adult 
Rio Cibolo, Tex_ 
1851 
_do_- 
_do_ 
_do_ 
449 
10 
Young 
Rio Nueces, Tex_ 
1851 
_do. __-_ 
_do_ 
_do__ 
450 
24 
_do 
Rio Sabinal, Tex_ 
1854 
Maj. Emory_ 
62 
_do___ 
Dr. Kennerly. 
451 
12 
_ _do. _ 
_--do-------__ 
1854 
61 
_do_ 
_do_ 
452 
10 
Adult.. 
San Pedro, near San An- 
tonio, Tex_ 
1853 
Lieut. Whipple_ 
5 
_do_ 
_do_ 
453 
1 
Near San Antonio, Tex.. 
1853 
__ .do.__ 
10 
_do_ 
_ „ _ _do_ 
454 
1 
Leon river, Tex__ _ _ _ 
1853 
_do___-_ 
11 
_.do_ 
_ _ - - do_- 
455 
1 
_do_ 
Rio Blanco, Tex_ 
1853 
_do_-_ 
23 
_do_ 
_do_ 
481 
3 
Young. 
Sugar Loaf creek, Ark... 
1853 
_do__ 
_do_ 
Mollhausen_ 
456 
1 
Adult. _ 
Rio Nueces, Tex_ 
1856 
Capt. John Pope_ 
_-do_ 
Capt. Po ... 
5. POMOTIS POPEII, Grd. 
Stec. Char. —Body sub-elliptical in profile. Head and mouth small; snout bluntly sub-conical. Posterior extremity of 
maxillary extending to a vertical line scarcely intersecting the anterior rim of the orbit. Eye small. Edge of preopercle not 
denticulated. Opercular flap moderate. Tips of ventrals overlapping the vent without reaching the anterior margin of the 
anal. Extremities of pectorals not extending as far back as the ventrals. Origin of dorsal fin situated opposite the insertion of 
tho ventrals. Uniform reddish brown ; fins olivaceous. 
In its general aspect this species greatly resembles P. aquilensis, from which it differs by 
a proportionally smaller head, hence a smaller mouth, for, the posterior extremity of the 
maxillary, reaches a vertical line falling a little in advance of the anterior rim of the orbit. 
The edge of the preopercle is perfectly smooth. A vertical line drawn from the origin of the 
dorsal fin intersects the origin of the ventrals in passing behind the base of the pectoral fins. 
The head constitutes a little less than the fourth, not quite the third of the entire length. The 
posterior margin of the caudal is sub-crescentic, being more deeply emarginated than in 
P. aquilensis. The branchiostegal rays are five on either side. The fins rays number as in the 
preceding species. The scales are well developed, especially upon the middle of the flanks, 
being quite reduced in size under the thoracic arch ; they are finely, though conspicuously, pecti¬ 
nated posteriorly. 
The color is of a reddish-brown hue, rather pale upon the specimens preserved in alcohol. 
An obsolete black patch may he observed upon the posterior and basal portion of the dorsal fin. 
This patch, in all probability, is more apparent on the living specimens. The fins otherwise 
are olivaceous, the inferior ones being tinged with grey. 
