THE GEOLOGICAL RECORD 



219 



of bony knobs on the sides, which also probably carried spines 

 protecting the vital organs. A row of similar bones along each 

 side of the powerful tail may also indicate spines, which would 

 have rendered this an effective weapon against an encmv from 

 the rear. In another allied species, of which the skull is hero 

 shown (Eig. 54), there were two enormous horns above the 

 eyes and a smaller one upon the nose; while the margin of 



Fig. 54. — Skull of Horned Dinosaur (Sterrolophus flabellatus). 

 From the Upper Cretaceous of Wyoming, U.S.A. (B.M. Guide.) 



the bony expansion behind seems to have borne a row of spiny 

 plates. 



As an illustration of how these huge but ratlior w(>ak vege- 

 table feeders ^vere protected, the above restoratiou uiny bo use- 

 ful, especially w^hen we remember that the species above tigured 

 was as bulky as a rhinoceros or elephant. It was found in 

 the Upper Jurassic strata of Xorth America. 



We now come to some of the largest laud-auiiual> which 

 ever lived upon the enrth — the Snuropodn, or liznrd-footed 

 Dinosaur — and these were more or less amphibious. One of 



