58 
ZOOLOGY. 
58. MONIANA LAETABILIS, Grd. 
Gen. Rep. 275. 
Spec. Char. —Body elongated, sub-fusiform. Head contained four times and a half in the total length. Snout sub-conical; 
jaws equal. Posterior extremity of maxillar bone extending to a vertical line drawn in front of the orbit. Eye large and 
circular; its diameter entering a little over three times in the length of the side of the head. Anterior margin of dorsal fin 
nearer the insertion of the caudal than the tip of the snout. Pectorals and ventrals well developed. Eeddish brown above ; 
sides silvery; beneath yellowish. 
120. Hurrah creek, tributary of Rio Pecos. H. B. Mollhausen. 
59. MONIANA PULCIiELLA, Grd. 
Gen. Rep. 275. Plate LYIII, Figs. 11—15. 
Spec. Char. —Body rather short and deep. Head constituting the fifth of the whole length. Snout sub-conical; upper jaw 
overlapping slightly the lower one. Posterior extremity of the maxillary extending to a vertical line drawn behind the nostrils. 
Eye moderate sized and circular; its diameter entering three times and a half, or a little more, in the length of the side of the 
head. Anterior margin of dorsal fin nearer the insertion of the caudal than the extremity of the snout. Ventrals and pectorals 
of moderate development. Keddish brown above, silvery upon the sides, and brownish yellow beneath. Fins unicolor. 
121. Arkansas river, near Fort Smith. Hr. Geo. G. Shumard. 
122. Sugar Loaf creek, tributary of Poteau river. Ii. B. Mollhausen. 
60. MONIANA FRIGIDA, Grd. 
Gen. Rep. 276. Plate LIX, Figs. 16—20. 
Spec. Char.— Body somewhat elongated, sub-fusiform. Peduncle of tail stoutish. Head constituting a little less than the 
fifth of the entire length. Snout sub-conical; upper jaw overlapping the lower. Posterior extremity of the maxillary 
extending to a vertical line drawn behind the nostrils. Eye moderate sized and circular; its diameter entering nearly four 
times in the length of the side of the head. Anterior margin of dorsal fin nearer the insertion of the caudal than the tip of the 
snout. Horizontal fins of moderate development. Eeddish brown above; yellowish or whitish beneath. 
99. Rio Frio, tributary of Rio Nueces, Texas. Dr. C. B. Kennerly. 
61. LUXILUS SECO, Grd. 
X 
Gen. Rep. 281. 
Spec. Char. —Body rather elongated, sub-fusiform in its outline. Head small, contained five times and a half in the total 
ength. Snout sub-conical, rather abbreviated. Gape of the mouth slightly oblique ; posterior extremity of maxillary extending 
to a vertical line intersecting the anterior nostril. Eye very large, sub-circular; its diameter entering about three times in the 
ength of the side of the head. Anterior margin of dorsal fin equidistant between the extremity of the snout and the fork of 
the caudal. Vertical fins moderately developed ; pectorals and ventrals rather small. Light reddish brown above ; yellowish 
white beneath. Fins light olive. 
60. Rio Seco, tributary of Rio Nueces, Texas. Dr. C. B. Kennerly. 
62. LUXILUS LUCIDUS, Grd. 
Gen. Rep. 282. Plate LX, Figs. 9—12. 
Spec. Char. —Body rather elongated, sub-fusiform in its outlines. Head moderate sized, contained five times in the total 
length. Snout sub-conical, tapering; gape of the mouth somewhat oblique ; posterior extremity of maxillar bone extending to 
a vertical line drawn in front of the orbit. Eye well developed; its diameter entering three times and a half in the length of 
the side of the head. Anterior margin of dorsal fin somewhat nearer the tip of the snout than the insertion of the caudal. 
Greyish brown above; yellowish beneath. Fins unicolor, assuming the tint of the region to which they belong. 
55. Coal creek, tributary of Canadian river.—56. Twenty miles west of Choctaw agency. 
H. B. Mollhausen. 
