FISHES. 
55 
43. EXOGLOSSUM MIRABILE, Grd. 
Gen. Rep. 256. Plate LYI, Pigs. 5— 8. 
Spec. Chau. —Head sub-conical, blunt, and constituting the sixth of the total length. Mouth small; posterior extremity of 
maxillar bone even with a vertical line drawn across the nostrils. Eye sub-circular; its diameter entering four times in the 
length of the side of the head. Anterior margin of dorsal much nearer the extremity of the snout than the base of the 
caudal. Insertion of ventrals placed somewhat posteriorly to the anterior margin of the dorsal, their tip nearly reaching tho 
vent. Reddish brown above ; middle of flanks with a silvery band; beneath light reddish. 
47. Arkansas river, near Fort Smith. Er. George G. Shumard. 
44. CLIOLA YIYAX, Grd. 
Gen. Rep. 258. 
Spec. Char. —Head contained somewhat over live times in the total length. Eye moderate; its diameter entering three 
times and a half in the length of the side of the head. Posterior extremity of maxillar bone not reaching a vertical line drawn 
in front of the orbit. Anterior margin of dorsal fin nearer the insertion of the caudal than the extremity of the snout. Yel¬ 
lowish with an obsolete greyish streak along the middle of the flanks, and a black spot at the base of the caudal. 
30. Leon river, Texas. Er. 0. B. Ivennerly. 
5. ALBURNELLUS EILECTUS, Grd. 
Gen. Rep. 259. Plate LYII, Figs. 9—12. 
Spec. Char —Head forming a little more than the sixth of the total length. Posterior extremity of maxillar bone reaching 
a vertical line drawn at the anterior rim of the orbit. Diameter of eye entering three times in the length of the side of the head. 
Anterior margin of dorsal fin somewhat nearer the fork of the caudal than the extremity of tho snout. Insertion of ventrals 
nearer the extremity of the snout than the base of the caudal fin. Pectorals slender, though far from reaching the insertion of 
the ventrals. Reddish yellow, with a lateral silvery streak. 
71. Arkansas river, near Fort Smith. Er. George G. Shumard. 
46. ALBURNELLUS UMBRATILIS, Grd. 
Gen. Rep. 260. 
Spec. Char. —Head constituting about the fifth of the whole length. Posterior extremity of the maxillary extending to a 
vertical line drawn at the anterior rim of the orbit. Diameter of the eye entering three times and a half in the length of the 
side of the head. Anterior margin of dorsal fin nearer the extremity of the snout than the fork of the caudal. Insertion of 
ventrals nearer the extremity of the snout than the base of the caudal. Pectorals not reaching the insertion of the ventrals. 
Dorsal region greyish brown; flanks silvery grey; belly reddish yellow. 
73. Sugar-loaf creek, Arkansas. H. B. Mollhausen. 
47. ALBURNOPS BLENNIUS, Grd. 
Gen. Rep. 261. Plate LVII, Figs. 13—16. 
Spec. Char. —Head constituting the fifth of the entire length. Snout blunt and abbreviated; lower jaw shorter than the 
upper; posterior extremity of maxillar bone extending to a vertical line drawn within the anterior rim of the orbit. Anterior 
margin of dorsal fin nearer the extremity of the snout than the insertion of the caudal. Insertion of ventrals situated slightly 
behind the anterior edge of the dorsal; their tips approximating the vent. Reddish brown, darker above than beneath, silvery 
on the sides; fins unicolor. 
67. Arkansas river, near Fort Smith. Er. George G. Shumard. 
