Marsh—fRestoration of European Dinosaurs. 411 
In the present outline restoration of Scelidosaurus, I have 
endeavored merely to place on record my idea of the form and 
position of the skeleton, when the animal was alive, based on 
the remains I have myself examined. In case of doubt, as, 
for example, in regard to the front of the skull, which is want- 
ing in the type specimen, I have used a dotted outline, based 
on the nearest allied form. Of the dermal armor, only the 
row of plates best known is indicated. The position chosen in 
this figure (Plate VI) is one that would be assumed by the 
animal in walking on all four feet, and this I believe to have 
been its natural mode of progression. 
Hypsilophodon. (Plate VII.) 
The third of these restorations, that of Hypstlophodon Fowit, 
Huxley, 1870, given in outline, natural size, in the diagram, 
has been made with much care, partly from the type specimen, 
and in part from other material mostly now in the British 
Museum. The figures and description by the late Dr. Hulke* 
were of special value, although my own conclusions as to the 
natural position of the animal when alive do not coincide with 
those of my honored friend, who did so much to make this 
genus of Dinosaurs, and others, known to Science. The resto- 
ration by Dr. Hulke is shown in another diagram. 
In the case of Hypstlophodon, a number of specimens are 
available instead of only one. ‘This makes the problem of 
restoration in itself a simpler matter than in Scelidosaurus. 
Moreover, we have in America a closely allied form, Zaosaurus, 
of which several species are known. A study of the genus 
Laosaurus, and the restoration of one species given on the 
plate before you, will clear up several points long in doubt. 
Huxley and Hulke both shed much light on this interesting 
genus, Hypsilophodon, indeed, on many of the Dinosauria. 
The mystery of the Dinosaurian pelvis, which bafiled Cuvier, 
Mantell, and Owen, was mainly solved by them, the ilium and 
ischium by Huxley, and the pubis by Hulke. The more 
perfect American specimens have demonstrated the correctness 
of nearly all their conclusions. 
Iguanodon. (Plate VIII.) 
The fourth restoration here given, that of Jguanodon Bernis- 
sartensis, Boulenger, 1881, one-fifth natural size, has been made 
in outline for comparison with American forms. It is based 
mainly on photographs of the well-known Belgian specimens, 
the originals of which I have studied with considerable care 
during several visits to Brussels. The descriptions and figures 
of Dollot have also been used in the preparation of this resto- 
ration. A few changes only have been introduced in the 
accompanying plate, based mainly upon a study of the original 
specimens. 
* Philosophical Transactions, 1882. + Bulletin Royal Museum of Belgium, 1882-'88. 
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