24 ZOOLOGY. 



15. CYPRINELLA GUNNISONI, Grd. 

 GEN. REP. 267. 



SPEC. CHAR. Body short, rather deep; hack somewhat arched. Peduncle of tail of moderate development. Head con 

 stituting less than the fifth of the total length. Eye moderate sized ; its diameter entering three times and a half in the length 

 of the side of the head. Posterior extremity of maxillar bone reaching a vertical line drawn near the anterior rim of the orbit. 

 Anterior margin of dorsal fin equidistant between the tip of the snout and the fork of the caudal. Origin of veutrals situated 

 in advance of the dorsal. Pectorals and ventrals rather small. Reddish brown, lighter beneath than above. Fins unicolor. 



139 Cottonwood creek, Utah. Mr. Kreuzfeld. 



16. CYPRINELLA BECKWITHI, Grd. 

 GEN. REP. 267. 



SPEC. CHAR. Body short, rather deep; back somewhat arched. Peduncle of tail slender. Head contained four times and 

 a half in the total length. Eye moderate sized ; its diameter entering four times in the length of the side of the head. Gape 

 of the mouth somewhat oblique. Posterior extremity of the maxillary extending to a vertical line drawn in front of the orbit. 

 Anterior margin of dorsal fin somewhat nearer the insertion of the caudal than the tip of the snout. Origin of ventrals situated 

 somewhat in advance of the dorsal. Pectorals slender, larger than the ventrals. Greyish brown above, orange red beneath 

 Fins unicolor. 



135. Sluice of Arkansas river, near Fort Makee. Mr. Kreuzfeld. 



17. CYPRINELLA LUGUBRIS, Grd. 

 GEN. REP. 271. 



SPEC. CHAR. Body elongated, sub-fusiform. Peduncle of the tail rather slender. Head contained four times and a half in 

 the total length. Eye large; its diameter entering three times and a half in the length of the side of the head. Snout sub- 

 conical ; gape of the mouth oblique ; posterior extremity of the maxillary corresponding to a vertical line drawn at the anterior 

 rim of the orbit. Anterior margin of dorsal fin nearer the tip of the snout than the insertion of the caudal. Origin of the 

 ventrals situated opposite the anterior edge of the dorsal. Pectorals and ventrals rather small. Dark brown above ; sides and 

 abdomen silvery white. Fins unicolor. 



141. Cottonwood creek, Utah. Mr. Kreuzfeld. 



18. CYPRINELLA LUDIBUNDA, Grd. 

 GEN. REP. 271. 



SPEC. CHAR. Body elongated, sub-fusiform. Peduncle of the tail rather slender. Head constituting the fifth of the total 

 length. Eye large ; its diameter entering about three times in the length of the side of the head. Snout sub-conical ; gape of 

 the mouth nearly horizontal ; posterior extremity of maxillar bone corresponding to a vertical line drawn behind the nostrils. 

 Anterior margin of dorsal fin equidistant between the insertion of the caudal and the tip of the snout. Origin of ventrals 

 situated somewhat in advance of the anterior edge of the dorsal. Pectorals and ventrals of moderate development. Reddish 

 brown ; middle of the flanks silvery; lateral line marked with black dots. 



132. Cottonwood creek, Utah. Mr. Kreuzfeld. 



19. MONIANA TRISTIS, Grd. 

 GEN. REP. 277. 



SPEC. CHAR. Body elongated, sub-fusiform. Peduncle of tail long and slender. Head constituting the fifth of the length. 

 Snout rounded and rather abbreviated; jaws equal. Posterior extremity of maxillar bone extending to a vertical line drawn 

 behind the nostrils. Eye large and circular ; its diameter entering about three times and a half in the length of the side of the 

 head. Anterior margin of dorsal fin somewhat nearer the extremity of the snout than the insertion of the caudal. Vertical 

 fins well developed. Reddish brown, lighter beneath than above, with a lateral dark streak. 



93. Mr. Kreuzfeld. 



