Am. Jour. Sci., Vol. XIII, 1902. 



Plate VII 



Explanation of Plate VIII. 



natural size 



combination of the 



Skull of Sinopa agilis Marsh ; inferior view- 

 type and another specimen in the collection. 



apf, anterior palatine foramen ; ppf, posterior palatine foramen ; appf, acces- 

 sory postpalatine foramina ; fo, foramen ovale; pgf, postglenoid foramen; per, 

 periotic; acf, anterior condyloid foramen; pp, paroccipital process; pcf, posterior 

 condyloid foramen; oc, occipital condyle; flp, foramen lacerum posterius ; flm, 

 foramen lacerum medius; fr, foramen rotundum; sf, sphenoidal fissure; op, optic 

 foramen; ef, ethmoidal foramen ; pi, palatine; mx, maxillary. 



