COMMON MARINE FISHES 25 



10b. Lateral line without dorsal branch. 



18a. Dor.sal and anal fins with alternate black and orange to whitish stripes. 

 Starry flounder, PlaUchthys stellaUis (page 136). 

 18b. Fins not so marked. 



19a. Pectoral fin on eyed side much longer than head. 



Rex sole, Ghjptocephalus zachirus (page 131). 

 19b. Pectoral fin on eyed side shorter than head. 

 20a. Gill opening extends well above pectoral base. 



21a. Mouth very large, maxillary extending to or beyond hind border of 

 lower eye. 



Arrowtooth sole, Atheresthes stomias (page 132). 

 21b. Mouth moderate, maxillary extending to about middle of lower 

 eye. 

 22a. Scales small, about 30 rows above lateral line. 



Petrale sole, Eopsetta jordani (page 133). 

 22b. Scales large, about 20 rows above lateral line. 



Slender sole, Lyopseita exilis (page 134). 

 20b. Gill opening barely extends above pectoral base. 



Dover sole, ilicrosiomns pacificus (page 135). 



