130 True Fishes 



SCADS, JACKS 



I. Bony shields extend whole length of lateral line from 

 behind head to base of tail 

 Page 131, fig. A 



See Rough Scad, p. 357. 



II. Bony shields only on rear part of lateral line 

 Page 131, figs. B-E 



Ila. Front portion of lateral line barely arched 

 Page 131, fig. B 



See Goggle-eyed Scad, p. 356. 



lib. Front portion of lateral line strongly arched 

 Page 131, figs. C-E 



1. Breast without scales 

 Page 131, fig. C 



See Common Jack, p. 357. 



2. Breast with small scales 

 Page 131, figs. D, E 



a. Straight part of lateral line starts under 

 origin of second dorsal fin 



Page 131, fig. D 



See Blue Runner, p. 358. 



b. Straight part of lateral line starts beneath a 

 point well back of origin of second dorsal fin 

 Page 131, fig. E 



See Horse-Eye Jack, p. 359. 



