22 GUIDE TO THE FOSSIL REPTILES, AMPHIBIANS, FISHES. 
Case M. away from the fossil exhibited, hut a few of the teeth (Fig. 16) 
are preserved in the hinder part of the jaws. Various small 
fragments of Stegosauria are also placed in Table-case 16. 
Sub-order 3. —Ornithopoda. 
Wall-eases The “ bird-footed ” Dinosaurs, or Ornithopoda, seem to 
Table^case ^ ave wa lked habitually on their hind limbs, which bear much 
17," 18. resemblance to those of ostrich-like running birds (Batitae). 
Stands They are well represented in the Museum by Iguctnodon and 
N> Hypsilophodon from the Wealden and Lower Greensand of the 
south of England and neighbouring parts of the Continent. 
Iguanodon (“ iguana-tooth ”) was named in 1825 by 
Mantell, who first discovered its teeth (Fig. 17), and 
Fig. 17.— Tooth of Iguanodon , outer view (a) and side view (b), from the 
Wealden of Sussex; nat. size. (Table-case 17.)^ 
recognised their close similarity to those of Iguanat, a lizard 
now existing in Central America. Some of the actual 
teeth from the Mantell Collection, exhibited in Table-case 
17, show various stages of wear, from the newly-cut crowns 
to mere flattened stumps, and obviously denote a vegetable- 
feeder. The earliest-discovered group of bones of the 
reptile, from Bensted’s Kentish Bag quarry at Maidstone, is 
Wall-case placed in the centre of Wall-case 7. This specimen was 
7. shattered by a shot fired in the hole still seen in the middle 
of the slab of rock, and the various pieces were collected and 
re-united with great skill by Mantell, who tried to interpret 
the bones by comparison with the skeleton of Iguana. 
