18 
U. S. P. R. R. EXPL. AND SURVEYS-ZOOLOG V-GENERAL REPORT. 
List of specimens. 
Catalogue number. 
No. of specimens . 
Locality. 
When .collected. 
Whence obtained. 
Nature of specimens. 
Collected by— 
412 
413 
414 
2 
6 
6 
Fort Washita .. 
Rio Brazos, Texa 
do do 
s. 
1853 
1854 
1854 
Captain Pope.. 
Dr. G. C. Shumard. 
__do____ 
Alcoholic. 
_do_ 
do 
Captain Pope .... 
Dr. Shumard_ 
' _ do 
6. CALLIURUS MURINUS, Grd. 
Plate YII, Figs. 1—4. 
U&pm* c 
B&yftrtl 
Ij'jZ — 
Spec. Char.— Mouth moderate; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line 
drawn inwardly to the anterior rim of the orbit. Eye moderate. Insertion of ventrals situated posteriorly to the base of 
pectorals and opposite the origin of the dorsal; their tips reaching the vent. Scales large. Dark blackish brown. Soft 
portion of dorsal fin provided with a black patch. 
Syn. —Calliurus murinus, Grd. in Proc. Acad. Nat. Sc. Philad. November, 1857. 
This species is closely allied to G. microps, from which it differs chiefly by its larger eye, a 
more elevated spinous dorsal, the insertion of the ventrals opposite the origin of the dorsal 
fin, instead of being placed posteriorly to it, the tips of the ventrals reaching the vent, and 
larger scales also. Besides, the latter are possessed with rather conspicuous pectinations. The 
edge of the preopercle is finely serrated, and the scales on the cheeks are but a little smaller 
than those on the opercular apparatus. 
Br. VI : VI; D X, 12; A III, 10; C 4, 1, 8, 7, 1, 3; V I, 5; P 14. 
The color is blackish brown above, lighter beneath; sometimes obsoletely banded transver- 
sally ; the sides of the head exhibiting sometimes sinuating bluish lines. The fins are of a 
dark greyish hue, unicolor except the dorsal, which is provided with a black blotch upon the 
posterior portion of its base. 
References to the figures .—Plate VII, fig. 1, represents Calliurus murinus, size of life. Fg. 2, 
is a scale from the dorsal region. Fig. 3, a scale from the lateral line. Fig. 4, a scale from 
the abdominal region. 
List of specimens. 
Locality. 
Whence obtained. 
Collected by— 
415 
416 
417 
418 
1 Indianola to Nueces, Texas. 
2 Delaware creek_ 
3 .do.... 
1 Headwaters of Rio Brazos .. 
1856 
1856 
1856 
1854 
Captain Pope. 
..do. 
.do. 
.do. 
Alcohol ic. 
_do- 
_do- 
_do- 
Captain Pope-..- 
.do. 
.do. 
..do.. 
