OCR Text |
Show 38 DR. W. ft. RIDEVYOOD ON THE CRANIAL [May 3, lateral parts of the supraoccipital are at their anterior ends in contact with the posterior edges of the alisphenoids. The posterior temporal fossa is very extensive. It is roofed over by the frontal, squamosal, and epiotic, while its iioor is formed by the postfrontal, alisphenoid, pro-otic, squamosal, supraoccipital, and exoccipital. Its aperture is bounded above by the Text-fig. ft. ps b s' sir Cranium of JElops saurus. A, dorsal view; 15, back view; C, left side. For explanation of lettering, see p. 81. epiotic and squamosal, externally by the squamosal, mesially bv the epiotic, and ventrally by the squamosal, exoccipital, and opisthotic. The epiotic is so largely overlapped by the parietal iind*squamosal bones, that only its posterior part is visible in a |