THE CAEP FAMILY. 159 



Principal Characteristics of the Graining. Length of head com- 

 pared to total length of body and tail-fin as 1 to 6 ; depth of body to 

 the same as 1 to 5. Nose more rounded than in the Dace, the upper 

 line of head being straighter ; lower edge of fore gill-cover less an- 

 gular j dorsal profile less convex. Back-fin commencing exactly half- 

 way between point of nose and end of fleshy portion of tail, whilst 

 in the Dace it commences further back ; all the fins somewhat longer 

 in proportion 5 scales rather larger j number in lateral line 48. Fleshy 

 part of tail long and slender. Throat-teeth in two rows (numbering 

 2 and 5) on each side. Colour : upper part of head and body pale 

 drab, tinged with red, and separated from lighter parts of body below 

 by a well-defined line. Cheeks and gill-covers silvery yellowish white ; 

 all the fins pale yellowish white. 



Fin-rays 



: D. 9 : P. 17 : V. 10 : A. \l : C. 19. 



THE RUDD, OR RED-EYE. 



(Leuciscus erythrophthalmus *. ) 



With the Rudd we begin the second series of the 

 Leuciscim, or Dace genus, viz. those in which the back- 



* From erythros, red, and ophthalmos, the eye, Gr. 



