THE VEND ACE 



117 



differences between the two may be tabulated 

 thus — 



LOCHMx\BEN VeNDACE 



{Coi'egoniis vaiidesius) 



The depth of the body is 

 contained three and two-thirds 

 to four and one-fourth times 

 in the length of the fish, the 

 length of the head four and 

 one-third to four and two- 

 third times. 



The caudal peduncle is once 

 to once and a half as long as 

 deep. 



The longest dorsal ray is as 

 long as or a little shorter than 

 the head, and the pectoral fin 

 extends considerably more 

 than one-half of the distance 

 from its base to the pelvic fins. 



The dorsal fin has seven or 

 eight, rarely nine, branched 

 rays. 



These differences are illustrated on Plate XV, 

 where examples of the two forms, in each case about 

 6 inches long, are figured. 



At one time Vendaces were plentiful enough in 

 Derwentwater and Bassenthwaite ; thus in 1856 

 Davy wrote that during the preceding eight years 

 a good many had been netted in both lakes. 



At the present day they are generally considered 

 to be scarce, but Mr. H. A. Beadle, a keen local 



^ I have counted the dorsal fin-rays in quite a number of Vendace, 

 and the result is as follows : Of 30 Lochmaben Vendace, 6 had 7, 21 

 had 8, and 3 had 9 branched rays in the dorsal fin, and of 14 Derwent- 

 water Vendace 3 had 8, 9 had 9, and 2 had 10 branched rays in the 

 dorsal fin. 



Cumberland Vendace 

 {Corcgonus gracilior) 



The depth of the body is 

 contained four to five times in 

 the length of the fish, the length 

 of the head four and one-half 

 to five times. 



The caudal peduncle is once 

 and a half to twice as long as 

 deep. 



The longest dorsal ray is 

 shorter than the head, and the 

 pectoral fin does not usually 

 extend much more than one- 

 half of the distance from its 

 base to the pelvic fins. 



The dorsal fin has nine, 

 sometimes eight or ten, 

 branched rays.^ 



