Sauropsida: Class Iteptilia 



499 



Fig. 390. Tyrannosawm and Triceratops. (From a painting by C. R. Knight. 

 Courtesy, American Museum of Natural History, New York.) 



Fig. 391. Stegosaurus, a Jurassic armored dinosaur about 18 feet in length. 

 (After Marsh and Gilmore. Courtesy, Romer: "Vertebrate Paleontology," Chi- 

 cago, University of Chicago Press.) 



