DINOSAURS 
171 
name Trachodon has been given, but it is really the same genus. 
Professor F. A. Lucas says that in some cases the impression of 
the skin was preserved in the surrounding rock, and that it 
appears from these that the creature was covered with small 
horny plates. Another at Yale University is twenty-nine feet 
long. The Natural History Museum possesses a specimen 
showing the skin. Gallery IV., Wall-case 8. 
The late Mr. J. W. Hulke, another English authority on 
Dinosaurs, described some twenty years ago a very remarkable 
and slender form of Dinosaur, on which we must now, in con- 
clusion, say a few words. Professor Huxley has also helped to 
unravel the meaning of its structure. Hypsilophodon is the name 
this little creature has received, on account of the nature of its teeth. 
As far as we know it was the smallest of the Dinosaurs with the 
exception of the Compsognathus ^ and Hallopus, and Scleromochlus. 
It is certainly the least specialised — that is, the least highly orga- 
nised. It lived during the Wealden period, or, in other words, 
during the closing scenes of the great Mesozoic era, and so was 
contemporary with others of a much more specialised character. 
As a rule the remains of animals found in our English Wealden 
and Cretaceous strata are in a fragmentary condition ; but in this 
case we have, fortunately, an exception. Almost the whole of its 
skeleton is now known, thanks to the labours of Mr. Hulke and 
the Eev. William Fox. The remains occur in a bed which crops 
out a short distance west of Barns High Cliff, and passes under 
the shore a few yards west of Cowleaze Chine, on the south 
coast of the Isle of Wight. A restoration of its skeleton, 
according to Hulke, is seen in Fig. 59, and in Plate XXV. we 
have the creature restored to life. The skull shows a combina- 
tion of characters belonging to a crocodile and a lizard, but is 
> ^ Greek — ko7npsos^ elegant ; ynathos, jaw. 
