PROM INDIA AND THE ISLE OF WIGHT. 



157 



Wealden, in which the centra are amphicoelous ; and also to those 

 of the much smaller Macrurosaurus * from the Cambridge Greensand, 

 in which there is a slight procoelous character in some parts of the 

 series, and distinct facets for chevron-bones are wanting. Their 

 extreme procoelous character seemed, however, so peculiar that at a 

 later date f I thought myself justified in assigning Titctnosaurus to 

 a new family of the Sauropoda. 



Thus the matter stood till some few months ago, when Mr. W. 

 Davies, of the British Museum, directed my attention to two 

 vertebra] centra in the Collection under his charge, which had been 

 obtained by the late Mr. Fox from the Wealden clay of Brook 

 in the Isle of "Wight. These centra, as Mr. Davies pointed out to 

 me, agree in general characters with those of Titanosauriis, and 

 almost certainly belonged to a closely allied form. The least imper- 

 fect of the two specimens, which is figured (with the neural arch 

 restored) in the accompanying woodcut, comprises the whole of the 



Caudal vertebra of a Dinosaur, with the neural arch restored; from the 

 Wealden of Brook, Isle of Wight. * nat. size, British Museum (No. 

 R. 151). 



centrum and the base of the anchylosed neural arch. The two 

 extremities are somewhat rolled and water-worn, and have thereby 

 lost somewhat of their original roundness ; but in general contour, 

 as well as in size, in the form of the articular surfaces, in the position 

 of the base of the neural arch, and the apparent absence of distinct 

 facets for chevron-bones, this specimen agrees very closely with the 

 centrum of Titanosaurus Blanfordi represented in pi. v. fig. 3 of 

 the memoir in the ' Palgeontologica Indica ' which has been already 



* Seeley, Quart. Journ. Geol. Soc. vol. xxsii. p. 440 (1876). 

 ^^Palseontologia Indica, ser. 4, vol. i. Introductory Observations, p. v 



