FISHES CYPRINIDAS MONIANA LEONIi\A. 



273 



The dorsal and anal fins are well developed ; the anterior margin of the dorsal fin is equi 

 distant between the extremity of the snout and the base of the. caudal fin ; the fin itself is 

 quadrangular, higher than long, and composed of eight rays, the last one being double, and the 

 anterior one rudimentary and in close contact with the next. The anal is shaped somewhat 

 like the dorsal ; it has nine developed rays, and an anterior rudimentary one. The caudal is 

 deeply furcated, with acute angles, and shorter than the head. It is composed of nineteen well 

 developed rays, and several rudimentary ones, above and below. The ventrals are posteriorly 

 rounded, composed of eight rays, and when bent backwards their tips reach the anus, which is 

 situated immediately in advance of the anal fin. The pectorals are elongated, rather slender, 

 rounded ; their tips not quite reaching the insertion of the ventrals. They are composed of 

 eleven slender, bifurcated, but not sub-divided, rays. The median rays of the dorsal, caudal, 

 anal, and ventrals, are sub-divided for at least one-fourth of their length, the bifurcation of the 

 first degree beginning about their middle. Formula of the rays : 



D 1, 7 H- 1 ; A 1, 9 ; C 2, 1, 9, 8, 1, 3 ; V 8 ; P 11. 



The scales are proportionally large, their posterior, superior, and inferior margins uniformly 

 rounded ; anteriorly sub-truncated ; twelve longitudinal rows of them may be counted upon 

 the line of the greatest depth of the body, and six rows on the peduncle of the tail. The 

 lateral line, which contains thirty-six scales, is considerably bent down on the abdomen, and 

 slightly interrupted in advance of the anal fin. 



The ground color, as preserved in alcohol, is dull bluish brown ; the back is bluish ; the 

 dorsal fin yellowish brown ; the caudal, pectorals, and ventrals being reddish. 



List of specimens. 



2. MONIANA LEONINA, Grd. 

 PLATE LIX, FIGS. 610. 



SPEC. CHAR. Body rather short and deep. Head constituting about the fifth of the total length. Snout sub-conical ; jaws 

 equal ; posterior extremity of maxillar bone extending to a vertical line drawn behind the nostrils. The eye is moderate sized; 

 its diameter entering four times in the length of the side of the heal. Anterior margin of dorsal equidistant between the tip 

 of the snout and the insertion of the caudal. Insertion of ventrals situated slightly in advance of the dorsal. Pectorals and 

 ventrals moderately developed. Greyish brown above ; white or dull yellowish beneath. 



SYN. Moniana leonina, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 199. 



This is the largest of the hitherto known species of the genus. The entire length measures 

 three inches and a quarter, the head forming the fourth of it, the caudal fin excluded. The 

 body is very deep upon its middle, where the greatest depth is a little less than the fourth of 

 the entire length. The mouth is proportionally small. The eye being circular, its diameter 

 entering four times in the length of the side of the head. The dorsal and anal fins are sub- 

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