YOUNG JACK CREVALLES 



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formed at 5.4 mm. standard length (fig. 17). 

 The second spine is longer than the first. An 

 interspinous membrane connects the second and 

 third spines to about 45 mm. The relation of 

 second anal spine length to standard length for 

 specimens smaller than 10 mm. is shown in figure 

 4. 



Dorsal soft-rays.— 22 to 25 (table 4). The full 

 complement is formed between about 7.5 and 

 8.5 mm. standard length. Segment marks are 

 present above 6.5 mm. (fig. 18). Branching of 

 the last ray occurs at about 8.5 mm. and of the 

 other rays at about 17 to 20 mm. (fig. 22). The 

 extension of the anterior 5 or 6 rays to produce 



the lobe begins at about 14 mm. (fig. 21). The 

 second ray averages the greatest length to about 

 35 mm.; above 35 mm., the first ray is longest. 

 The longest ray averages a greater length than the 

 longest spine. 



The regression of first dorsal soft-ray length on 

 standard length is shown in figure 25 and table 3. 

 A line fitted to this regression for specimens from 

 5.6 to 83.5 mm. standard length shows a propor- 

 tional rate of increase for the two variates within 

 this size range (0.13-mm. increase in soft-ray 

 length per 1.0-mm. increase in standard length). 

 The coordinates larger than 83.5 mm. fall above 

 the extension of the calculated regression line, 



Figure 18. — Caranx crysos larva, 7.0 mm. standard length (Gill 3, Reg. 60). 



Figure 19. — Caranx crysos juvenile, 8.5 mm. standard length (Gill 3, Reg. 52). 



