LEUCISCUS ERYTHROPHTHALMUS. 



137 



but in the Island Cherso, which lies to the east of Istria. But the snout is 

 sharper, the mouth wider, the dorsal fin is higher than long 1 , and similar to the 

 anal ; it is chiefly met with in Bosnia and Dalmatia, where it is common in 



Fig. 64. LEUCISCUS ERYTHROJPHTHALMUS, YAK. PLOTIZZA (HECKEL AND KNER). 



the Rivers Kerka and Zermagna, and is distinguished by the local fishermen as 

 the Dergle. 



A second variety, originally indicated by Bonaparte as.//, scardafa (Fig. 65), 

 is characteristic of Italian waters, and is known in Italy as the Cavezzal ; it is 



Fig. 65. LEUCISCUS ERYTHROPHTHALMUS, VARIETY SCAKUAFA (BONAPARTE). 



also found in the Narenta, in Dalmatia, and is there called the Pesquelei, or 

 Pesckkegl. The only characters which distinguish it even as a variety are the 

 more abrupt angle at which the lower jaw ascends, the slightly concave profile 

 of the forehead, and the horizontal outline of the abdomen. The scales (Fig. 66) 

 have a regular fan of rays, which indent the convex contour of each posterior 

 free border. The sides of the head have a mother-of-pearl lustre, but the 

 colours are not otherwise remarkable. 



