FISHES. 55 



43. EXOGLOSSUM MIRABILE, G r d . 

 Gen. Eep. 256. Plate LVI, Figs. 5—8. 



Spec. Char. — Head sub-conical, bluut, and constituting ilie sixth of the total length. Mouth email ; 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 the 

 vent. Reddish brown above ; middle of flanks with a silvery band; beneath light reddish. 



47. Arkansas river, near Fort Smith. Dr. George G. Shumard, 



44. CLIOLA VIVAX, G r d . 

 Gen. Eep. 258. 



Spec. Char. — Head contained somewhat over five 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 greyibh streak along the middle of the flanks, and a black spot at the base of the caudal. 



30. Leon river, Texas. Dr. C. B. Kennerly. 



45. ALBURNELLUS DILECTUS, Grd. 



Gen. Rep. 259. Plate LVII, Figs. 9—12. 



Spec. Chak — 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 the 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. Dr. George G. Shumard. 



46. ALBURNELLUS UMBRATILIS, Grd. 



Gen. Rep. 260. 



Spec. Chak.— 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— 1G. 



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. Dr. George G. Shumard. 



