96 
ACTINOPTERYGII. 
maxilla, deepened and very robust at the anterior palatine ar 
culation, and its oral border very slightly sinuous, tho f e ® ^ 
convexity in its middle third bearing tho largest teeth. Depth 
dentary at the symphysis equalling one third the total lengt 
the mandibular ramus, and its oral border excavated in its nut 
Fig. 
Portheus gaultinus ; partial restoration of head by E. T. Newton, one 
nat. size. _ j r r 
as., alisphenoid; bs., upper portion of basisphenoid ; eth., mesethmo^^, 
frontal ; hm., faeette for hyomandibular ; ju., supramaxilla ; .j, 0 tic ; 
oh., supraorbital; [olf, foramen for olfactory nerve; op.oty ^ntal 
pa., parietal region ; palatine; pmx., premnxilla ; i w V r, > P t f ro0 tal 
(eotethmoid) ; pr.ot., pro-otio; ps., orbitospheuoid (?) ; sp- 0< "’ ? )0 
(sphenotie). 
