304 R. Lydekker—Notes on Dinosaurian Remains. 
proximal extremity of a left tibia. It agrees very closely, both 
in size and characters, with the tibia of Iguanodon Mantelli, but 
appears to have been solid throughout. The great expansion of the 
head and cnemial crest distinguishes it from the tibia of Huscele- 
saurus, which appears to have had a bony union with the fibula, as 
in Stegosaurus, and it therefore appears that the generic distinctness 
of Orosaurus is justified. Unfortunately, however, this term is 
preoccupied by the more correctly formed Oreosaurus, Peters,’ and I 
accordingly propose to replace it by the name Orinosaurus.? Since, 
moreover, no specific name was proposed by Prof. Huxley for this 
Dinosaur, I would suggest that it should be known as O. capensis. 
If I am right in regarding this tibia as solid throughout, the speci- 
men is of considerable interest as apparently showing a connection 
between the Stegosauride and Iguanodontide, and thereby serving 
to confirm Dr. Baur in his conclusion that these two families should 
be included in a single suborder. 
3. IquaANoDON Frrront, n. sp. 
Among a series of specimens from the Wadhurst Clay near 
Hastings, recently collected by Mr. C. Dawson, F.G.8., for the 
British Museum, are an apparently associated left ilium, part of a 
pubis, and the imperfect sacrum (B.M. No. R. 1685), which appear 
to indicate a distinct species. The specimens were obtained at the 
village of Shornden, and although the sacrum was found at a 
distance of some fifty yards from the ilium, Mr. Dawson has no 
doubt that both specimens belonged to the same individual. 
The ilium, which I take as the type of this form, indicates a 
somewhat smaller animal than the ilium from a somewhat lower 
horizon which forms one of the types of I. Dawsoni.. Moreover, it 
differs from that ilium in that the preacetabular process merely 
forms a thin vertical plate, and entirely wants the horizontal inner 
extension found on the lower border of the latter. Again, while in 
I. Dawsoni the postacetabular portion forms a deep plate with a 
rounded termination, the corresponding portion of the present speci- 
men has its lateral surface terminating in a point, while the inferior 
border is bent inwardly to form a shelf-like projection on that side. 
The portion of the ilium immediately above the acetabulum is rela- 
tively deeper, and the acetabulum itself less well defined than in 
I. Dawsoni. The associated sacrum has laterally-compressed and 
anchylosed vertebree like those of I. Mantelli, from which species 
the present form is at once distinguished by the greater height of the 
ilium and the inflection of the lower border of the postacetabular 
portion. The only other named form to which this specimen could 
possibly belong is Sphenospondylus gracilis of the Upper Wealden, 
but the ilium appears to be proportionately much too large for the 
vertebrae, and the sacrum is different from the one which J have 
suggested may belong to that genus. 
I propose to designate this apparently new form as J. Fittoni in 
1 Abh. Ak. Berlin, 1862, p. 201. 2 From the adjectival épeds, 
3 See ‘Cat. Foss. Rept. and Amphib. in Brit. Mus.’ pt. i. pp. 197-199. 
