Figure 5.— JJoraal siev of §kull ofAuxis rochei (ca. 2" cm SL) on the left and A. 

 thazard (ca. .')0 cm SI.) on the right. .Vote that the temporal crests of the A. rochei 

 skull are parallel with each other and with the supraoccipital crest, whereas in 

 A. thazard the temporal crests diverge anteriorly so that the three crests are not 

 distinctly parallel (Yoshida and Nakamura 1965). 



Figure 6. — Relation between the width and length 

 of the cranium of Auxis thazard and A. 

 rochei. Width: distance between widest points of 

 pterotic processes; length: distance from anterior 

 margin of vomer to concave ventral tip of aperature 

 of myodome. (Yoshida and Nakamura 1965.) 



LENGTH OF CRANIUM (mm) 





"1 |--,-7Ty,-p-.|-4.^-,"|«Y'"f 



3 3 4 6 8 "J 8 9701 8 3 4 6 6 7 8 9 8 1 



I I I' I I I I ' I ' I I I I I I I I I ' I I I l.i.AJii,Aid.iLJm<.i.lmLiA.L*I.^..i.^.,l.l,,.iJw.l,..J^,J. 



Figure 7.— Lateral view of skleton of Auxis thazard (top) and A. rochei (bottom). Note 

 that in A. thazard, the anterior branch of the haemal processes are much longer than in 

 A, rochei and that they are in contact with the preceding haemal arches on the 24th to 

 the 28th vertebrae (Yoshida and Nakamura 1963). 



11 



