Collette and Gillis Osteological differences between two species of Crammatorcynus 



23 



dennosphenotic 



anterior process 



cheek scales 



Figure 10 



Left infraorbital bones in lateral view, (a) Scomberomorus maculatus, Cape Hatteras. NC, 534 mm FL; (b) Acanthocybium solandri, 

 Revillagigedos Is., 1068mm FL; (c) Grarmnatocrynus bilineatus, Timor Sea, 453mm FL. 



forms the ventral border of the orbits and connects 

 with the lateral ethmoids, basisphenoid, prootics, and 

 basioccipital bones dorsally. The lateral wings of the 

 parasphenoid extend dorsolaterally along the ventral 

 ridge of the prootic bones on either side, and have 



pointed ends which form part of the anteroventral wall 

 of the posterior myodome. Posteriorly, the parasphe- 

 noid bifurcates into two lateral flanges that attach 

 dorsally to the corresponding posteroventral flanges 

 of the basioccipital bone, and surround the posterior 



