PLATE LXV. 

 Cretaceous Dinosaurs. — Predentata. 



Ceratopsid^;. 



Page. 

 Sacrum of Triceratops prorsus Marsh; seen from below ; one-eighth natural size. 212 

 a, anterior face of first sacral vertebra ; j>, posterior face of last sacral ver- 

 tebra; a, neural spine of last vertebra; z, anterior zygapophysis of first 

 vertebra; 1-10, transverse processes, left side. 

 374 



