190 University of Washington Publications in Biology [Vol. 2. 



4a. Gill rakers 15 or 16 below angle of first arch (seldom 14) ; least 

 depth of caudal peduncle 6 l / 2 to 7j4 times in body; scale formula 

 about 10+65+20; body with numerous narrow almost parallel blue 

 lines. Range: Vancouver Island to San Benito Island, Lower Cali- 

 fornia. Marine. Common. 

 Blue Perch 312. Tacniotoca lateralis (Agassiz) 



4b. Gill rakers fewer than 14 below angle of 1st arch (usually 11 to 13). 



5a. Dentigerous surface of lower pharyngeals convex; dorsal X, 21 

 to 24; anal III, about 25 to 29; dark blotch below posterior corner 

 of jaw just back of maxillaries ; gill rakers 13 below angle (rarely 

 12) ; least depth of caudal peduncle about 7 to 8 in body ; scales 

 about 8+56 to 64+18. Range: Vancouver Island to Todos Santos 

 Bay, Lower California. Marine. Common. 



Pile or Silver Perch 313. Damalichthys vacca Girard 



(=£?. argyrosomus) 



5b. Dentigerous surface of lower pharyngeals flat or concave; dorsal 

 X or XI, 22 to 26; anal III, 29 to 34; no dark blotch just behind 

 maxillaries; least depth of caudal peduncle 8 to 9>4 in body; gill 

 rakers about 11 or 12 below angle of 1st arch; scales 66 to 69 in 

 lateral line. Range: Vancouver Island to San Diego, California. 

 Marine. Common. 



Splittail Perch. White Surf -fish. Forktail Perch 



314. Phanerodon fnrcatus Girard 



3b. Lower lip without a broad f renum, the groove continuous across chin ; 

 dorsal spines VIII to X (usually IX). 



6a. Gill rakers 15 or more below angle of 1st arch. 



7a. Below angle of 1st arch 15 to 19 rakers; 65 scales in lateral 

 line ; eye Yz head ; anal III, 29 to 35 ; dorsal IX or X, 25 to 

 29. Range : Cape Johnson, Washington to southern California. 

 Marine. Common. 

 Silver Perch or Porgy. . .315. Tocichthys cllipticiis (Gibbons) 



7b. More than 20 rakers below angle of 1st arch; 72 scales in the 

 lateral line; eye 2 /s head; anal III, 32; dorsal IX, 27; charac- 

 teristic black tips to pelvic fins. Range : Columbia River mouth 

 to Lower California. Marine. Common. 



White Perch. Wall-eyed Perch 



316. Hyperprosopon argent earn Gibbons 



6b. Gill rakers fewer than 15 below angle of 1st arch, usually 6 or 

 7+11 to 13; about 60 to 69 scales in the lateral line; anal III, 

 26 to 30 ; about 9 to 10 orange to brassy colored vertical bars on 

 sides of body. Range : Washington to Monterey, California. 

 Marine. Common. 

 Porgy 317. Holconotus rhodoterus Agassiz 



