12 



Table IV. No. of branchiostegal rays in Anguilla vulgaris, A rostrata and A.japonica. 



A. Rays from right side. 



B. Rays from left side. 



A. vulgaris (0.240 and 0.248 respectively), and the P. F. A. of the two species would 

 most probably fall clear of each other if more accurately determined by investiga- 

 tion of a somewhat larger material than the 83 specimens here employed. 



As usual, an attempt was made to discover possible racial differences by 

 examination of three large samples from localities as widely removed as possible 



