LEUCISCUS ILLYR1CUS. 165 



at an angle of about 45, and reaches under the nares. The nose is blunt, 

 but more pointed than in the Dace or Chub. The fleshy lips of the pre- 

 maxillaiy extend forward over the lower jaw ; the nares are nearer to the 

 eye than to the snout. The profile over the head is straight, and then rises 

 abruptly in a sharp curve to the back, which is highest in front of the dorsal 

 fin. The ventral profile forms a more regular curve. 



The dorsal fin is opposite the ventral, as long as high, rather truncated 

 behind, with the last ray two-thirds of the length of the longest ray. The 

 proportions of the anal fin are similar, but it is shorter and lower. The 

 pectoral and ventral fins are moderately developed, and the caudal fin is 

 smaller than in any of the species described. Its longest rays are only two- 

 thirds of the length of the head. It is evenly-lobed, but the fork is short. 



The size of the largest scales exceeds the diameter of the eye ; the free 

 edge of a scale shows about twenty or more fine rays, while the concentric 

 striping is almost invisible to the naked eye. This 

 character of the scales forms a useful distinguishing 

 difference from the Chub (Fig. 89). 



It would appear to be a rare species, since the descrip- 

 tions are drawn from specimens in spirit ; and it is 

 impossible, therefore, to speak with certainty of the 



Fig. 89. LARGE SCALE 



colours. The back appears to be blue-grey, and only or LEUCISCUS ILLYHICUS. 

 a little darker than the side. The operculum is coppery. 



Black pigment margins the free edges of the scales, so that the upper part 

 of the body has the aspect of being covered with a network. 



This fish reaches a length of thirteen inches in the River Isonzo, which flows 

 into the Adriatic Sea. It is also known from Knin and Sign, in Dal- 

 matia, where it is distinguished by the provincial name " Klien/' 



LeilciSGUS pictus (HECKEL and KNER). 

 D. 11, A. 1112, V. 8. Scales : lat. line 4344, transverse 8|-/6. 



This species is known only from the River Rieka, in Montenegro, where 

 it reaches a length of five to six inches. Dr. Giinther describes it as having 

 remarkably thick lips, with the lower lip extending across the median sym- 

 physis as a continuous fold. 



The height of the body is equal to the length of the head. The diameter 

 of the eye is two-ninths of the length of the head, and is rather more than 

 half the width of the inter-orbital space. The cleft of the oblique mouth 

 does not extend back to the front of the orbit ; the mandible is overlapped by 



