26 U. S. P. R. R EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
A. 
List of specimens. 
Catalogue number. 
No. of specimens. 
Sex and age. 
Locality. 
When collected. 
Whence obtained. 
Original numbers, j 
Nature of specimens. 
Collected by— 
446 
1 
Young. 
Eagle Pass_ 
1853 
Maj. Emory___ 
Alcoholic. 
A. Scliott_ 
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. 
450 
24 
_do... 
Rio Sabinal, Tex. 
1854 
Maj. Emory. 
62 
_do_ 
Dr. Kennerly. 
451 
12 
do. 
_•_do__ 
1854 
_do_ 
61 
_do_ 
....do 
452 
10 
Adult.. 
San Pedro, near San An¬ 
tonio, Tex_ 
1853 
Lieut. Whipple_...... 
5 
_do_ 
_do__ 
453 
1 
_do_ 
Near San Antonio, Tex_ 
1853 
_d<^_ 
10 
_do_ 
_do_ 
454 
1 
_do_ 
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 
Mollhausen_ 
456 
1 
Adult.. 
Rio Nueces, Tex_ 
1856 
Capt. John Pope_ 
_do_ 
Capt. Po ... 
5. POMOTIS POPill, Grd. Up— 
T 
SrEC. 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 suh-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. 
