490 Zoological Society ; — 



interior sides. L. erythrophthalmus has only four teeth in the in- 

 ferior row. 



As in most Leucisci the second dorsal ray is unbranched and 

 tapering, and the first, which is shorter, is applied closely to its base 

 without the intervention of membrane. In this species the second 

 ray is the tallest in the fin, and it is perfectly flexible, without any of 

 that stiffness which is characteristic of Agassiz' genus Rkodeus, in 

 which moreover the pharyngeal teeth are chisel-shaped. The first 

 ray of the dorsal stands on the highest point of the back, and exactly 

 midway between the tip of the snout and the extremities of the 

 middle rays of the caudal ; while the middle of the dorsal is in the 

 middle of the total length measured to the points of the caudal rays. 

 The insertion of the ventrals again is midway between the point of 

 the snout and the base of the caudal. 



Eays: — Br. 3-3 ; D. 10 ; A. 13, last ray deeply divided ; V. 9 ; 

 C. 19|; P. 15 or 16. 



Body much compressed, thinning off rapidly towards the belly : its 

 greatest thickness is considerably above the middle, and is equal to 

 between a third and a fourth of its utmost height. Lateral line 

 traced along the lower third of the height, parallel to the curve of 

 the ventral edge, and consequently very concave upwards. It is 

 composed of forty-two scales. Under the front of the dorsal, where 

 the body is highest, there are seven rows of scales above the row 

 which forms the lateral line and four below, or twelve in all. The 

 scales are dotted with black on the edges, and traversed by about 

 four radiating lines on the exposed disk and two or three shorter 

 ones on the covered base, all issuing from the same point. Head 

 small, its length being contained four times and a half in the total 

 length of the fish, measured to the tips of the caudal lobes, and being 

 consequently perceptibly less than the height of the fish. Its breadth 

 between the eyes is a very little in excess of the diameter of the eye, 

 and is greater than the thickness of the body. Preorbitar scale bone 

 nearly rectangular, with the corners rounded off, a little longer than 

 high, and traversed by an unbranched muco-duct, which is continu- 

 ous with the muciferous tube of the other suborbitars : the second 

 of these bones is narro\ter than the third one. 



Mandible ascending and shutting against the front of the upper 

 jaw. Its joint is directly beneath the anterior curve of the orbit. 

 The eye is nearer to the tip of the snout than to the gill-opening, 

 and its diameter rather exceeds a third of the length of the head. 

 First ray of the dorsal standing midway between the tip of the snout 

 and the extremity of the middle caudal ray ; while the middle of the 

 fin is equidistant from the tip of the snout and the distal points of 

 the caudal lobes. Tips of the pectorals slightly overlapping the base 

 of the ventrals, which lies midway between the end of the snout and 

 the base of the caudal. The greatest height of body is at the front 

 of the dorsal, and rather exceeds one-fourth of the entire length of 

 the fish. 



M. Valenciennes remarks that descriptions, even when aided by 

 good figures, do not suffice to discriminate the nearly resembling 



