THE CAEP FAMILY. 143 



on each side. Number of scales in lateral line 52. Vertebrae 41. 

 Colour: over upper part of head and back dark blackish blue, be- 

 coming lighter on the upper part of sides ; lower part of sides and belly 

 silvery white ; fins bluish brown, more or less tinged with brown. 



Fin-rays: D. 12 : P. 17: V. 19 : A. 19 : C. 19. 



Genus LEUCISCUS*. 



THE DACE, DARE, OR DART. 



(Leuciscus wdgaris f.) 



Generic characteristics : the anal fin short at the base, 

 as well as the back-fin, and without strong bony rays at 

 the commencement of either : no beards. The genus may 

 be divided into two sections : the first having the dorsal 

 fin almost exactly over the ventrals, and the second having 

 the dorsal placed considerably further back. 



The common Dace, Leuciscus vulgaris, is a bright, grace- 

 ful fish, and makes a gallant fight when hooked, rising 



* Leuciscus, Gr. for Dace ; the diminutive of leukos, white. 

 t vulgaris, common, Lat. 



