VI PEEFACE. 



Of the genus Cimoliosaurus (which is taken to include many 

 of the genera of other writers) twenty-eight species are recorded, 

 many of which, however, are founded on very incomplete skeletal 

 remains and are therefore liable to still further revision. This is 

 also true of several other genera included in this Catalogue. 



The Author carefully points out that the classification adopted 

 in this Catalogue is not necessarily final, hut may serve as a 

 basis on which a more elaborate arrangement may be hereafter 

 constructed, when we possess a fuller knowledge of the forms 

 now so imperfectly known to us. 



HENRY WOODWARD. 



Department of Geology, 

 25th April, 1889. 



