418 



CYPRINID.E. 



fin is short, the second the longest, and as long as the base 

 of the fin ; the last ray double. The fleshy part of the 

 tail is narrow ; the caudal rays forked, the central rays being 

 only half as long as those which are terminal. 



The Azurine has the upper part of the head, back, and 

 sides of slate blue, passing into silvery white beneath, and 

 both shining with metallic lustre ; the irides white, tinged 

 with pale straw yellow ; all the fins white. 



The vignette below represents, on the left hand a scale of 

 the Rudd, and on the right a scale of the Azurine, to exhibit 

 the differences in form, and in the number of the radiating 

 lines or tubes. 



