54 ZOOLOGY. 



38. HYBOEHYNCHUS CONFERTUS, Grd. 

 GEN. REP. 233. PLATE LIX, FIGS. 1115. 



SPEC. CHAR. Head constituting the fifth of the total length. Eye sub-circular ; its diameter entering nearly four times in 

 the length of the side of the head. Greatest depth of the body more than the length of the head. Caudal fin entering five 

 times in the total length. Insertion of ventral fins situated opposite the anterior margin of the dorsal. Scales rounded upon 

 their anterior edge also. Pale reddish above ; yellowish beneath. A black spot at the anterior margin of the dorsal. Peduncle 

 of tail with a dark streak along its middle. 



147. Hurrah creek, tributary of Rio Pecos. H. B. Mollhausen. 



39. IIYBOGNATHUS ARGYRITIS, G r d . 

 GEN. REP. 235. PLATE LIII, FIGS. 58. 



SPEC. CHAR. Body sub-fusiform in profile. Head sub-conical, contained five times and a half in the total length. Eye 

 large and sub-circular. Anterior margin of dorsal fin nearer the extremity of the snout than the base of the caudal. Insertion 

 of ventrals equidistant between the two points just alluded to in reference to the dorsal. Caudal fin entering four times and a 

 half in the total length. Scales anteriorly sub-truncated. Olivaceous brown above, yellowish beneath, with a silvery streak 

 along the middle of the flanks. Fins unicolor, greyish olive. 



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



40. GOBIO VERNALIS, G r d . 

 GEN. REP. 249. 



SPEC. CHAR. Head contained about five times and a half in the entire length, in which the caudal fin enters four times. Eye 

 large, sub-circular ; its diameter entering three times and a half in the length of the side of the head. Body sub-fusiform, 

 rather thick anteriorly ; anterior margin of dorsal fin nearer the extremity of the snout than the insertion of the caudal. Tip 

 of pectorals not extending as far as the origin of the ventrals ; tip of ventrals extending to the anterior edge of the vent. 

 Yellowish brown ; sides silvery. 



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



41. LEUCOSOMUS PALLIDUS, Grd. 

 GEN. REP. 251. PLATE LXI, FIGS. 610. 



SPEC. CHAR. Head moderate sized, rather elongated, entering four times and a half in the total length. Snout sub-conical 

 and tapering. Eye moderate ; its diameter being contained five times in the length of the side of the head. Gape of mouth 

 somewhat oblique ; posterior extremity of the maxillary extending to a vertical line intersecting the anterior rim of the pupil. 

 Anterior margin of dorsal fin nearer the insertion of the caudal than the extremity of the snout. Insertion of ventrals situated 

 somewhat in advance of the anterior edge of the dorsal. Greyish brown above, yellowish white beneath ; a black spot at the 

 base of the caudal and anterior edge of the dorsal fin. 



157. Antelope creek, tributary of Canadian. Dr. C. B. Kennedy. 

 42. LEUCOSOMUS TNCRASSATUS, Grd. 

 GEN. REP. 252. PLATE LXI, FIGS. 16. 



SPEC. CHAR. Head rather large, sub-conical, constituting about the fourth of the total length. Eye moderate sized ; its 

 diameter entering a little over five times in the length of the side of the head. Gape of the mouth slightly oblique ; posterior 

 extremity of maxillar bone reaching a vertical line drawn within the anterior rim of the orbit. Anterior margin of dorsal fin 

 equidistant between the fork of the caudal and the extremity of the snout. Insertion of ventrals situated in advance of the 

 anterior edge of the dorsal. Dark greyish above, light greyish beneath, with a black spot at the anterior edge of the dorsal. 

 Other fins unicolor, light yellowish olive. 



156. Twenty miles west of Choctaw agency. H. B. Mollhausen. 



