FISHES — CYPEINIDAE — CYPRINELLA LUDIBUNDA. 



271 



9. CYFEINELLA LUGUBRTS, Grd. 



Spec. Char. — Body elongated, sub-fiisirorm. Peduncle of tlio tail rather slender. Head contained Tour 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 e.xtremity 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. 



Stn. — Cyprinella lugubris, Grd. in Proc. Acad. Nat. Sc. Philad. VlII, 1856, 199. 



This species is one of those collected by the party of which the gallant Gunnison was the 

 commander. 



It is elongated, sub-fusiform ; the head being large and so is the mouth, although the latter 

 is smaller than in C macrostoma, referred to in the United States and Mexican Boundary report. 

 The ventrals are small, posteriorly truncated, inserted under the anterior margin of the dorsal ; 

 their tips not reaching the vent. The pectorals are lanceolated, and their extremities not 

 extending as far as the origin of the ventrals. The dorsal is much higher, and the anal 

 somewhat deeper, than long ; the anterior margin of the latter being nearly equidistant 

 between the isthmus and the tip of the lower lobe of the caudal. 



D 2, 8 + 1 ; A 2, 9 + 1 ; C 7, 1, 9, 8, 1, 8 ; V 1, 8 ; P 14. 



The scales are of but moderate development. The color is dark brown above, the sides and 

 the abdomen pervaded with a silvery tint. The fins are unicolor, greyish and yellowish. 



List of specimens. 



10. 



CYPRINELLA LUDIBUNDA, Grd, 



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 raaxillar bone corresponding to a vertical line drawn behind the no.strils. 

 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 dot^. 



Syn. — Cyprinella ludibunda, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 199. 



This species is an associate of the preceding one, and was collected under the same 

 unfortunate circumstances. 



Although all the specimens which we have examined are immature, still there is no doubt 

 in our mind as to its specific diff'erence from all the species hereto alluded to. The head is 

 small and conical, with the snout round and tapering. The mouth being small. The ventrals 

 . are inserted in advance of the anterior margin of the dorsal. 



D 1, 8 ; A 1, G ; C 4, 1, 9, 8, 1, 5 ; V 1, 8 ; P 12. 



Owing to the somewhat damaged condition of the fins, the foregoing formula of the rays 

 must be considered as an approximation, and not held for absolutely correct. 



