SUPPLEMENT. 253 



the fibula. This specimen agrees in relative size with the 

 type, and probably belonged to the same individual ; it 

 approximates to the corresponding bones of Stegosaurus, 

 there being apparently a bony union between the tibia 

 and fibula. 



R. 1625 b. The distal extremity of the left tibia and fibula, with 

 the astragalus attached to the former. Noticed by Huxley, 

 op. cit. p. 4, as belonging to the right side. This speci- 

 men is probably the distal portion of the preceding. The 

 tibia is much less expanded than in Iguanodon, and the 

 three bones appear to be united, as in Stegosaurus. 



R. 1625 C. Fragmentary undetermined bones. Two of these speci- 

 mens have been cut and polished in order to exhibit their 

 internal structure, which appears to be completely solid. 

 It is stated in the original description that these speci- 

 mens show a large medullary cavity, but this statement 

 seems to be due to a misapprehension of their structure. 



Genus ORINOSAURUS, Lydekker 1 . 



Syn. Orosaurus, Huxley 2 . 



Distinguished from the preceding by the much greater expansion 

 of the head of the tibia, which has a large cnemial crest like that 

 of Iguanodon. Apparently no bony union between the tibia and 

 fibula. The genus may form a link connecting the Stegosauridce 

 and Iguanodontidce. 



Orinosaurus capensis, Lydekker 3 . 



Syn. Orosaurus, sp., Huxley 4 . 



The type species. Considerably larger than Euscelesaurus broivni. 

 Hah. South Africa. 



R. 1626. The proximal extremity of the left tibia ; from the Storm- 

 berg beds of the Karoo system at Aliwal North, in the 

 Stormberg range. The type specimen. Described by 

 Huxley in the ' Quart. Journ. Geol. Soc' vol. xxiii. pp. 4, 

 5, as the distal extremity of the femur ; but redetermined 



1 Geol. Mag. dec. iii. vol. vi. p. 353 (1889). 



2 Quart. Journ. Geol. Soc. vol. xxiii. p. 5 (1807). — Preoccupied by Oreo- 

 sanrus, Peters, Abb. Ak. Berlin, 1862, p. 201. 



3 Loc. cit. * Loc. cit 



