51 



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S 



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Tlie collection of specimens has been subsequently carried on by 

 the Royal Society of Edinburgh, thromgh their General Secretary Mr 



Robison. 



The more important animal relics, which the limestone quarry 

 has since yielded, are various kinds of fish, some of them referrible 

 to the extinct race of the Palaeoniscus, large scales, evidently sau- 

 rian, exhibiting a most brilliant lustre, and presenting in remark- 

 able abundance what seem to be the epiphyses of vertebrae, numerous 

 fragments of bones much broken, and teeth which, in their internal 

 structure, give evidence of the dentition that is peculiar to animals 

 more or less resembling the Crocodile, or Gavial. 



a c 



The above figures represent the section of a tooth, obtained by Mr Robison, which 

 had been accidentally broken in a longitudinal direction. 



a shews the base of the tooth. , . i 



6 is the reverse side of the same, in which a small internal cavity may be observed, 



indicative of a newer replacing tooth in an incipient state of growth, 

 c is the larger fragment of the tooth in which the newer tooth, of a conoid form, 



(protruded from its alveolus) is contained. 

 The cavities of the new tooth, and of the intermediate space of the old tooth, are 

 at present filled with earthy substance. 



The author then proceeded to point out other localities in which 

 beds of fresh-water limestone crop out. 



At East Calder, and to the south-west of INI id Calder, the lime- 

 stone which is there quarried appears, like that of Burdiehouse, to 

 have a fresh-water origin. Its strata have undergone great derange- 

 ment, and dip in various directions. In one of the quarries of East 



