BULLETIN OF THE BUREAU OF FISHERIES. 
In general the head is pyramidal, slightly broader above than below, snout pointed, premaxillary 
protractile; maxillary slipping under preorbital, without barbel; lower jaw with or without horny 
sheath: distance between nostrils equal to their distance from tip of snout; eye anterior, large, placed 
low, a line from tip of snout to tip of opercle passing through middle of pupil (in specimens about 100 
mm. long); snout equal to eye; body deep and compressed, regularly tapering to both extremities; 
caudal peduncle slender, its depth 2.8 in head; lateral line decurved, almost concentric with ventral 
outline; scales 54 to 62 in lateral line, 12 to 14 above, and 6 or 7 below. Pectorals not reaching ventrals, 
of 15 or 16 rays; ventrals of 10 rays, inserted under middle of body, extending to vent; dorsal with 11 
or 12 rays, rarely 10 or 13, its origin slightly behind insertion of ventrals; anal with 11 to 14 rays, usually 
13, margin slightly concave, its origin under end of dorsal; caudal fin large, nearly a half longer than 
head, deeply cleft, the middle rays 2.2 in longest, lower lobe longer than upper. Color, plain dusky 
above, pale below, older specimens darker. (Description based on specimens from Jacinto.) 
The following tables show the variations in this species: 
MEASUREMENTS OF HEAD. 
= 
Number of specimens with head— 
| 
Size. 
0.234. | 0.24. | 0.24%. | 0:25. 
Nee = 
SUMMARY OF THE VARIATIONS IN Size or Eyr, SHOWING Its RELATION TO SIZE OF FIsH. 
Number of specimens with eye— 
Size. ; 7 
0.053. | 0.06. | 0.063. 
0.07. | 0.073. 
Millimeters. | 
100-109. 
110-119. 
120-129. 
130-139. 
Neoure 
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The size of the caudal peduncle as given in the table of measurements varies considerably. The 
variation in its depth is partly due to the method of preservation and partly to the size of the specimens. 
There may also be a slight locality variation, specimens from southern localities apparently having 
the caudal peduncle slightly deeper. Only 7 of the 68 specimens measured have the caudal peduncle 
over 0.17, and 5 of these are from Tule River. The following table shows that there is some relation 
between the size of the specimen and the depth of the caudal peduncle, the depth being slightly greater 
in smaller specimens. The length of the caudal peduncle does not vary with the size of the fish. 
