FISHERY BULLETIN: VOL. 76, NO. 1 



G 2.9 



K 117 



L 15.1 



Figure 3. — Scomber japonkus, A to F; S. scombrus, G to L; lengths (SL) are given in millimeters. 



trunk, posterior to the nape, particularly at 

 lengths less than about 8 mm (Figures 3, 4). AUS. 

 scombrus specimens examined, 2.6 mm and 

 larger, possessed dorsal melanophores. At lengths 

 less than about 5 mm this pigmentation consists of 

 a single median series of dendritic melanophores, 



initially 3 to 6 in number, increasing to 4 to 13, 

 located between myomeres 13 and 28. In larvae 

 greater than about 5 mm the median series be- 

 comes double, one row on each side of the develop- 

 ing dorsal fin base, and increases in number of 

 melanophores and extent so that by a length of 9.5 



102 



