156 



FIG. 99. 



Gordonia traquairi ; restoration of skull from the superior (A), inferior (B), 

 and lateral (C) aspects, somewhat less than one-half nat. size. Triassic (?) ; 

 Elgin. /, frontal; i.pa., so-called interparietal ; I, lachrymal ; md., mandi- 

 ble, the lateral vacuity not shown, and the symphysial region added in 

 outline to the front border of the fossil; mx., maxilla; na., nasal; orb. , 

 orbit ; pa., parietal crest, of undetermined constitution, but the pair of 

 small bones encircling the pineal foramen probably to be regarded as 

 parietals ; pin., pineal foramen; pi. , vomero-palatine region; pmx., pre- 

 maxillary region; prf., prefrontal; pt., pterygoid; pt.fo., interpterygoid 

 vacuity; pt.na., hollow into which the backwardly-directed posterior nares 

 open ; ptf., postfrontal and pos'torbital bar; qu., quadrate ; sq., squamosal ; 

 sq.p., downward process of squamosal tipped by quadrate; t, maxillary 

 tooth; tern., supratemporal vacuity. (After E. T. Newton.) 



