Animal Remains. 193 



sometimes they are thoroughly impregnated with iron ore. In gen- 

 eral they are much broken and often rolled. In one instance, how- 

 ever, I noticed a succession of large vertebrae, one or two occasion- 

 ally being absent, for a distance of LO or 12 feet. Some of these are 

 9 inches thick, and as much in length. The head in this instance 

 was wanting ; and, indeed, nearly all the other bones, except the ver- 

 tebrae. But it is improbable that these could have been moved in 

 so connected a state, far from the spot where this huge animal died. 

 In the green and ferruginous sand, vertebrae are found only occa- 

 sionally ; and they are generally much smaller than those in the con- 

 glomerate ; but they are not rolled. 



It ought perhaps to be mentioned, that the largest vertebrae noticed 

 above, occur in the curved bed of conglomerate which lies apparently 

 upon the edges of the other strata. And yet, the conglomerate and 

 the contained bones, interstratified with the clay, cannot be distin- 

 guished from those of this upper bed, except that in this single in- 

 stance the bones are rather larger and less broken and rounded. 



Such of these vertebrae, as I thought it would be of any use to 

 have drawn, are exhibited on Plate XII. Figs. 23, 24, 25, and 28. 

 Pieces of the ribs, (some of them 4 or 5 inches in their greatest di- 

 ameter,) bones of the head, &c. are in general so broken, that a sketch 

 of them would be useless. They will be found among the speci- 

 mens. All the vertebrae that are drawn, are from the green and 

 ferruginous sand. 



The teeth that accompany these bones, give us some clue to 

 the nature of the animals here entombed. All the varieties of these 

 teeth which I could find, after a protracted search, are exhibited on 

 Plate XI. Figs. 11, 12, 13, 14, 15, and 16. The flat teeth, Figs. 

 11, 12, and 13, are evidently those of the shark: and Fig. 12, must 

 have belonged to a giant species. Probably also the triangular teeth, 

 Figs. 14 and 15, belong to the shark ; and these are more numerous 

 than the others, and rather more broken ; though all of them are 

 very often much injured. 



Fig. 16 appears to be the fragment of a crocodile's tooth ; corres- 

 ponding with one figured in Cuvier's Ossem.ens Fossiles. It was found 

 in the ferruginous sand, and it differs from all the petrifactions noticed 

 at this cliff, in that it is converted into a substance exactly resembling 

 flint. It is hence not at all probable, that any of the bones that have 

 been described, were connected with this tooth. 



It ought to be noticed, that sometimes masses of lignite are con- 

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