TAB. XIX. 



Megalosanrus Bucklandii ; nat. size. 



Three anterior dorsal vertebrae : p, parapophysis, or lower transverse process : t, acces- 

 sory tubercle contributing some attachment to the head of the rib : d, diapo- 

 physes, or upper transverse process, fractured, which gave attachment to the 

 tubercle of the rib : h, oblique buttress extending from the parapophysis to 

 the diapophysis, and contributing to the support of the neural platform : z, 

 the prozygapophysis, s', the zygapophysis, forming the ends of the neural 

 platform and articulating the neural arches of the vertebrae with each other, 

 hs, the neural spine of the foremost of these vertebra?, ns', the neural spine of 

 the second vertebra ; it expands at its extremity, overhangs the anterior 

 shorter spine, and developes a strong bony plate from its back part which 

 fixes it to n", the similarly developed and modified spine of the third vertebra. 



The extraordinary size and sti'ength of the spines of these anterior dorsal 

 vertebras, indicate the great force with which the head and jaws of the 

 Megalosaurus must have been used. 



From the Wealden, near Battle. In the Museum of Samuel H. Beckles, Esq., F.G.S. 



