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AMERICAN PERMIAN VERTEBRATES 



oval or rounded eminences, separated by irregular pits or valleys. 

 The width between the temporal vacuities is very great, only a 

 little less than is the length of the skull. Indeed, so markedly cotylo- 

 saurian is the shape of the skull and so noticeable are the rugosities, 

 that before the temporal vacuities had been worked out I con- 

 cluded, notwithstanding the skeletal characters, that the animal 

 was a real cotylosaurian. However, notwithstanding these resem- 



FiG. 2g. — Casea broilii. Skull, from below, natural size. 



blances, and others of the pelvis, there are other characters quite 

 at variance with those of the Cotylosauria. 



The width between the orbits is also very great, fully one-half 

 the width of the skull in its widest place. The parietal foramen 

 is situated just back of a line drawn through the posterior margins 

 of the orbits, and sutural lines seem to indicate that the frontal 

 bones border it in front. Neither temporal vacuity, as stated, is 

 quite complete, and that of the right- side as preserved is smaller 

 than that of the left; possibly in my reconstruction I have made it 

 a trifle too long. The quadrate of the left side had been pressed 



