EXTINCT MONSTERS 
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well-known Iguanodon. It is called by Professor Marsh, Clao- 
saurus ; and it represents a whole family of herbivorous Dinosaurs. 
In length it was nearly thirty feet, and must have stood nearly 
fifteen feet high. The remains of this remarkable creature were 
discovered by two of Professor Marsh’s assistants in the Laramie 
Fig. 57. — 1. Skull of Claosaurus annectens, side view. 2. The same, front view. 
(After Marsh.) 
beds of Wyoming, associated with those of the still more strange 
Triceratops, and also of some diminutive mammals lately dis- 
covered. 
The most important feature in the skeleton of the Claosaurus 
is the skull. This is long and narrow, and, as seen in Fig. 57, 
