Fishery Bulletin 90(1), 1992 



9 

 C 



LIVER 



^:::::>::-M CAECAL MASS 



• • • • ^ 

 ■ • • • • 



• • • • i 



I NTESTI NE 



GONAD 



P?aS?X^ 



t^i: 



STOMACH 



GALL BLADDER 



^ U 



RINARY BLADDER 



GAS BLADDER 



Figure 5 



Ventral view of viscera, (a) Scomberomorus 

 tnaculatus, Georgia, 290mm FL; (h) Acan- 

 thocybium solandri, Campeche Banks, Mex- 

 ico, 1280mm FL; (c) Grammatorcynus 

 bilineatus, Marshall Is.. 424 mm FL; (d) G. 

 bicarinatus, Australia. 



Frontal The paired frontals form the largest 

 portion of the dorsal surface of the neurocranium. A 

 small, elongate oval pineal opening is present between 

 the posterior ends of the frontals. A larger and more 

 irregular foramen is present in Acanthocybium, but 

 Scomberomorus lacks this opening (Collette and Russo 

 1985b:figs. 11-12). 



In Scomberomorus and Acanthocybium, the frontals 

 form a median ridge that increases in height posteriorly 



and joins the supraocoipital crest. Grammatorcynus 

 lacks this ridge and the supraoccipital crest begins 

 posterior to the pineal opening, giving the top of the 

 skull a much flatter appearance than in the other two 

 genera. 



In ventral view (Fig. 8), the left and right frontals 

 articulate with the pterosphenoids at the anterior end 

 of a median opening into the brain cavity. The ridge 

 around the anterior end of this space forms a point and 



