632 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Figure 15. — Juvenile, 67.5 mm. standard length. 



Figure 16. — Juvenile, 152 mm. standard length. 



Figure 17. — Adult, 380 mm. standard length. 



cephalus, 43.3 mm. (tig. 7), has pigment, on the 

 dorsal surface of the eye. 



During the early metamorphic period, the 

 melanophores increase in number and size, and 

 the dorsal surface of the air bladder becomes 

 densely pigmented (fig. 10). 



During the mid-metamorphic period melano- 

 phores appear on the head, those on the body in- 

 crease in number, and the dorsal and caudal fins 

 develop a distinct pattern of pigmentation (figs. 

 11 and 12). 



By about 35 mm. (fig. 14) during the late meta- 

 morphic period the pattern on the dorsal surface 

 of the head and body becomes denser, the pigment 

 on the dorsal and caudal fins extends, and some is 

 present on the anal fin. By the end of the late 

 metamorphic period (50-60 mm.) the dorsal pat- 

 tern is a dense greenish-black, grading to silver 

 below. The pattern on the fins is a uniform pep- 

 per-spot appearance on the dorsal and caudal fins, 

 with a few scattered spots on the pectoral and pel- 

 vic fins, and a small group on the anal fin. 



