FISHES CYPRINIDAE ALBURNOPS SIIUMARDI. 



261 



In both of the latter genera the ventrals are situated in advance of the dorsal. The caudal is 

 furcated. On the other hand, the anal has a narrower base than- in Alburnus and Alburndlus ; 

 the lateral line is nearly median, instead of being deflexed upon the abdomen. 



1. ALBURNOPS BLENNIUS, Grd. 

 PLATE LVII, FIGS. 1316. 



SPED. 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. 



SYN. Alburnops llennius, GRD in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 194. 



This species has the snout most prominently rounded. The posterior extremity of the 

 maxillary extends to a vertical line drawn somewhat within the anterior rim of the orbit. The 

 eye is rather large ; its diameter entering three times and a half in the length of the side of 

 the head. The greatest length being about three inches and a half, the head forming the fifth 

 part of it ; the depth of the body is less than the length of the head. 



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



The anal fin is deeper than long ; its anterior margin is nearly equidistant between the 

 isthmus and the tip of the lower lobe of the caudal. The pectorals are slender and longer than 

 the ventrals. 



The scales, deeper than long, are sub-lozange-shaped and furrowed upon their posterior 

 section. There are ten longitudinal rows upon the greatest depth, six above the lateral line 

 and three below it. 



The color is reddish brown ; the middle of the flanks silvery ; the fins unicolor. 



References to the figures. Plate LVII, fig. 13, represents Alburnops Uennius, size of life. 

 Fig. 14, a scale from the dorsal region. Fig. 15, a scale from the lateral line. Fig. 16, a scale 

 from the abdominal region. 



List of specimens. 



2. ALBURNOPS SHUMARDI, Grd. 

 PLATE LVII, FIGS. 14. 



SPEC. CHAR. Head constituting the fifth of the total length. Snout sub-conical, lower jaw shorter than the upper. 

 Posterior extremity of the maxillary reaching a vertical line drawn across the anterior rim of the pupil. Anterior margin of 

 dorsal fin equidistant between the extremity of the snout and the insertion of the caudal. Insertion of ventrals situated slightly 

 behind the anterior margin of the dorsal ; their tips approximating the vent. Reddish brown ; flanks silvery. 



SYN. Alburnops shumardi, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 194. 



