

ROOM III. SYNOPSIS OF CONTEXTS. 141 



Second Shelf from the Top. On the left, two small cylin- 

 drical bones, possibly of the anterior extremity of a young 

 Iguanodon. Tibia and fibula, (marked No. 2) of the same 

 individual as the femur on the right hand, (labelled No. 5.) 

 These three specimens give the relative proportions of the 

 thigh and leg of this species of Iguanodon. 



A very fine femur (marked No. 3) ; and the largest and 

 most perfect in the collection, (marked No. 1,) which is forty- 

 four inches long, and twenty-two inches round the shaft ; this 

 specimen was dug up from the Weald Clay near Loxwood, in 

 Sussex, and presented to the Author by the late Earl of 

 Egremont. 



Sacral vertebrae. On the trays containing these magnificent 

 thigh bones, there are placed four specimens of sacral verte- 

 brae, which are highly interesting. The right hand vertebrae 

 are a portion of the sacrum of the Megalosaurus ; the generic 

 relations of the next specimen, (which is figured in " Philos. 

 Trans." for 1841, PL IX. fig. 5,) is not ascertained : the single 

 sacral vertebra on the left belongs to the Iguanodon ; the 

 fourth specimen -is part of the sacrum ascribed, with much 

 probability, to the Hylceosaurus. " Brit. Assoc. Report," 

 p. 114. 



Narrow Shelf. Numerous teeth, comprising upper and 

 lower molars of Iguanodon, of various ages, and in different 

 stages of detrition. 



Polished transverse sections of the tibia of a young Tgua- 

 nodon. 



Portion of the anterior part of the upper jaw of the Igua- 

 nodon ; (figured and described in "Phil. Trans." 1848, 

 PL IX.) 



Horn, or dermal tubercle, (figured in " Fossils of Tilgate 

 Forest," PL XX. fig. 2,) probably of the Iguanodon. 



Portion of the lower jaw of a reptile, Regnosaurm Nor- 

 thamptoni, (figured and described in "Phil. Trans." 1841, 

 PL V. and 1848,) from Tilgate Forest. 



Lower Division. Numerous ribs, vertebrae, and chevron- 

 bones, and bones of the extremities ; namely, metatarsals or 

 metacarpals, phalangeals, and ungueals. 



A slab of Tilgate grit with six anterior caudal vertebra?, 

 and three chevron-bones of an Iguanodon ; a matchless 

 specimen. 



