YOUNG JACK CREVALLES 



497 



Gill rakers. — Lower limb, 16 to 18; upper limb, 

 6 or 7; total, 22 to 25 (table 18). Of the specimens 

 examined above 20 mm., about 90 percent had 

 from 1 to 3 rudimentary gill rakers at the origin 

 of the lower limb (modally, 1 below 80 mm. and 

 2 above 80 mm.). All specimens of more than 

 60 mm. had these lower-limb rudiments. About 

 80 percent had from 2 to 5 rudimentary gill rakers 

 at the origin of the upper limb (modally, 3 below 

 80 mm. and 3 to 5 above 80 mm.). All specimens 

 above 45 mm. had these rudiments. Ginsburg 

 (1952: 92) reported the upper 3 or 4 gill rakers 



on the upper limb to be short or tuberclelike in 

 larger specimens (to about 366 mm., converted), 

 and 1 or 2 tubercles in front on the lower limb. 

 This indicates that gill rakers at the origins of 

 both limbs become shorter or rudimentary with 

 growth of the fish. 



Scutes. — Range of the mean number of scutes 

 above 100 mm. standard length: about 32 to 

 39 (fig. 77). Ginsburg (1952: 92), working with 

 specimens from about 53 to 366 mm. (converted), 

 found a scute range of 30 to 42. Nichols (1939: 

 4) gave an average number of scutes for his 



70| i i i 1 r 1 1 r 



60 



50 



"I 1 r 



~i 1 1 r 



1 1 1 r 



lotus 



lotus and/or hippos 



-1 L 



50 



j i i i L 



— 60 



50 



_1 I i i 



-I 1 I l_ 



100 150 200 



STANDARD LENGTH IN MM. 



J i i i 



250 



J I I I 



40 



30 



X 

 h- 



< 



20 X 



10 



Figure 75 — Caranx latus and Caranx sp. ("lahis and/or hippos"): Relation of body depth at pelvic and of head length to 



standard length. 



