102 



THE FRESH-WATER FISHES OF EUROPE. 



It fattens vvitli age, and the body then becomes nearly cylindrical. It is 

 brought to the Vienna market under the name of Lake Carp, but its flesh is 

 less prized than that of the Danube Carp. 



The Ct/prinus regina was described by Bonaparte from Italy, and after- 

 wards identified by Heckel as occurring in the Treviso ; but Canestrini 

 follows Giinther in regarding this, like the other types we have named, as 

 only a variety of C. carpio. The body is less elongated (Fig. 37) than in C. 

 hiingariciis, and is more compressed, so that while the back is angular in C. 



Fig. 37. CYVKINUS HEGINA (UONAI'AKTE). 



) in C, hungaricus it is broad. The scales are larger than in that variety 

 the largest above the lateral line exceed in size the diameter of the eye. 



A broad variety of Cyprinu& carpio, found in the muddy rivers and ponds 

 of Southern Russia, is known as the C. nordmanni (C. and V.). It reaches a 

 weight of two and a half pounds. 



HYBRID BETWEEN THE COMMON CARP AND THE CRUCIAN CARP. 

 D. 4/1820, A. 3/56, V. 2/8, P. 1/17, C. 19. 



Wherever the Cyprinus carpio and Carassius vulgaris are kept in a 

 domesticated state this hybrid is met with ; but its hybrid nature was not at 

 first recognised, and is stated to have been first proved by Dybowski. 

 Indeed, the celebrated ichthyologists Heckel and Kner regarded it as the 

 type of a distinct genus, and described the form as a species, under the 

 name Carpio kollarii; and on this account it may be interesting, from its 

 bearing upon evolution of species, to give some detailed description of its 

 characteristics (Fig. 38). 



