290 THE BATH OOLITE PERIOD. CHAP. 



happened to this valuable treasure-trove. The bones evidently 

 belonged to the same kind of animal, and might, if re-discovered, 

 help to complete the history of the limbs. Perhaps, if the remains 

 had been treated with the respect shewn to the buried lizard of 

 Enslow Bridge, we might have had from Northamptonshire as large 

 a series of bones, and among them some parts of the head which 

 are still unknown. 



While this sheet is passing through the press, I learn that in 

 the National Museum of Geology, in Jermyn Street, some large 

 vertebrae of ceteosaurus are preserved, which were derived from the 

 Great oolite of Essendine, near Grantham. 



And another series of caudal vertebrae, one of which almost 

 exactly matches the large specimen represented in Diagrams XCIL, 

 XCIIL, XCIV., has been found at Chipping-Norton. In the same 

 situation was a fine, though broken, tooth of megalosaurus, crenated 

 on the posterior edge. These are now in the Oxford Museum. 



Before passing entirely from the consideration of the animal 

 which has occupied us so long, a few words appear necessary in 

 regard to the names which have been assigned to the two species 

 which appear to be indicated by characteristic differences, especially 

 in the caudal vertebras and in the metatarsal bones. In the 

 Oxford Museum the first discovered femur was labelled Ceteosaurus 

 giganteus, a name which the larger examples since found may 

 perhaps fully justify. But it will be seen in a future page that 

 the claim is disputable on behalf of some very large vertebrae in 

 the Portland rock of Thame. 



Professor Owen, from considerations of the vertebras known to 

 him, which appeared to be shorter than some named C. longus, 

 and longer than some named C. brevis, gave the name of C. medius 

 (Reports of the Brit. Assoc. 1841). 



The application of these names is doubtful only in the case of 

 the Oxford fossils, in which the length of the vertebrae varies 

 considerably in the same animal. In his Memoir on Ceteosaurus 

 (Pal. Soc. 1857), the same author calls the Oxford femur C. longus 

 a well-deserved epithet but the vertebrae which belong to this 

 species are not longer than those which previously received the 

 title of medius. To remove ambiguity, then, I propose for the 

 species found in the immediate vicinity of Oxford and elsewhere, 

 the only one for which sufficient materials are collected to serve 



