jDINOSA urs. 
II5 
the reader will find a large framed drawing of the skeleton of 
Stegosaurus, kindly sent by Professor Marsh, whose forthcoming 
monograph will be welcomed by all palaeontologists. 
The last, and in some ways the strangest of the Dinosaurs, 
was the Triceratops ^ that flourished in America at the end of the 
I 
Fig, 28. — I, 2, Plates of Stegosaurus. The middle figui'es show their thick- 
ness. (After Marsh.) 
long Mesozoic era, during the Cretaceous period. The name 
refers to the three horn-cores found on the skull, which probably 
supported true horns like those of oxen. Whereas the Stegosaur 
was provided with quite a small skull, this monster had one of huge 
^ Greek — Ireis, three ; ceras, horn ; o_ps, face. 
