1 (; |. 



TTiK fi;ksii-w.\tki; I'ISIFK 



• F KT'ROPE. 



i^ramilations on the to}) of the head and sides of tlie body in the Da<'e of 

 Switzerland. 



Attempts have been made to introduce Dace into the Lake of Geneva, but 

 hitherto withont success. 



The variety which was described l)y Linnrous as C/jprinns lencixcn-'!, and 

 which has, therefore, g-ood claims to be considered the type of the Dace tribe, 

 is most widely distributed, being- found throughout Euopean Russia, though 

 absent from the Caucasus. According to Canestrini, it is absent from Italy, 

 and it is exceedingly rare in Austria; JKit througliout Germany, Switzerland, 

 France, and Belgium, it is generally present. 



Leueisciis rostratns (Fig. 87) , is a variety known in the Tyrol as i\\Q Murzlhi;/. 

 The dorsal profile is nearly horizontal, but the back rises suddenly from the head. 



The vertebral column varies a little, there being from twenty-three to 

 Iwenty-four abdominal, and nineteen to twenty caudal verte])ra\ 



Leuciscus illyricus (Heckkl and Kner). 



D. 11, A. 1; 



Scales: lat. line li) — 51-, transver: 



This fish belong-s to a small group of species which arc found in the 

 South of Europe. It has the high compressed body and large scales 

 characteristic of the preceding species^ but is especially distinguished by the 



Fii> SS.— i.i I cis( I s ir I Mill is (tikckki. and kxkh). 



upper jaw being the longer, by shortness of all the fin-rays, by the nume- 

 rous rays on the scales, and by the small size of the eye (Fig. 88). 



The head is one-fifth of the length of the fish, and the height of the body 

 exceeds the length of the head. The eye is one-sixth of the length of the head, 

 is separated from the snout by twice its diameter, and the eyes are separated by 

 about two and a half times the orbital diameter. The mouth extends downward 



