12 



Dinosauria Pelorosaurus. 



It seems almost certain that the detached tooth described as 

 Hoplosaurus armatus, and the cervical and dorsal vertebrae and 

 pelvis, described under the names of Ornithopsis Hulkei and 

 0. eucamerotus, are referable to the same form. The head in 

 Brontosaurus, with which genus Ornithopsis has been compared, 

 was very diminutive in comparison with the size of its huge 

 vertebrae and limb-bones (see Fig. 13J. 



Wall-case, 

 No. 3. 



FIG. 14. (a) inner, (6) outer, (c) profile views of a tooth of Hoplosaurus armatus (Gervais), 

 from the Wealden of the Isle of Wight, |. 



Pelorosaurus, another large land Saurian of the Wealden 

 period, is referred to this sub-order. It probably exceeded in 

 size the largest Iguanodons, and is represented in the Collection 

 by the humerus, which is 52 inches in length. 



Another humerus noticed above (p. 10) as having been 

 referred to Cetiosaurus humerocristatus, by Hulke, probabl}' 

 belongs to this same genus. An imperfect vertebra from the 

 Oxford Clay, near Peterborough, also may be referred to another 

 species of this genus, and is remarkable for its large size. 



In the Southern hemisphere these gigantic Dinosaurs were 

 also found. In the same case are exhibited vertebras and portions 

 of limb-bones of an enormous species, Bothriospondylus mada- 



