BIHANG TILL K. SV. VET.-AKAI). HANDL. BAND 26. AFD. IV. N:0 8. 33 



The fishes a, (i. y, d, v and o are from Petrovsk, £, rj, d 

 and A from Dolgoi and c, j' and a are from Kulali. 



I have counted the number of gillrakers in many speci- 

 mens of this kind from diiferent localities and found the 

 variation to be between 23 and 38. 



a 

 b 

 c 

 d 



e 

 f 

 9 

 h 



i 



3 

 k 

 I 

 m 

 n 

 o 

 P 



(id. means »irregularly (d.) decreasing with age», 

 ii. » » (i.) increasing » > .) 



The three separate tables from which it can be seen that 

 the variation with regard to the relative measurements is 

 rather great in these fishes have been comprised with the 

 maxima and minima in this last table. 



Clupea Kessleri might be regarded as the most distin- 

 guished of these forms. It is easiest to recognize at first 

 look on fresh material becanse it has much finner scales 

 which are also better fixed in the skin than those of the 

 others. I do not remember that I have seen any spotted 

 specimen of this species, but when it is just caught it has a 

 metallic hue which is very beautifiil. It has also a broader 

 and raore fleshy body being a more strongly bailt animal, 



3 



