YOUNG JACK CREVALLES 



435 



of hippos and overlaps all but crysos in this 

 character. 



The relationship of the number of scutes and 

 length of fish has been dealt with for another mem- 

 ber of the family. Blegvad (1944) suggested that 

 the number of scutes of Selar kalla (Cuvier) in- 

 creased with the total length. Bapat and Prasad 

 (1952: 114) combined their observations with 

 Blegvad's and showed a scute increase from 21 to 

 22 at 35 mm. total length to about 40 at about 128 

 to 134 mm. total length. 



Lateral line. — As shown by the estimated perim- 

 eters of the ranges of the mean lateral-line ratios 

 (fig. 14), a slight overlap of crysos and latus with 

 hippos occurs in this character. The interspecific 

 relationships of the mean lateral-line ratios are 

 similar to those of the mean number of scutes for 

 the five common species of Caranx;i. e., the longer 

 the length of the straight lateral line relative to the 

 length of the curved lateral line, the greater the 

 number of scutes. The specimens of dentex and 

 lugubris do not conform to this — the range of the 



100 150 200 



STANDARD LENGTH IN MM. 



250 



300 



Figure 13. — Comparison of the variations of the mean number of scutes with respect to standard length for five 



species of Caranr. 



