PKEFACE TO THE SECOND EDITION. vii 



lessor Owen, and upon the Oolitic Mammals and the Deino- 

 saurian and Sauranodont Eeptiles of North America, by 

 Professor Marsh. The Author may add that he would have 

 considerably modified the section dealing with the so-called 

 " Tabulate Corals," had his investigations into the structure 

 and relationships of these fossils been completed in time. 



The number of illustrations in the present edition has 

 been largely increased. Most of the new engravings have 

 been drawn by the Author, and have been transferred to the 

 wood by Mr Charles Berjeau. Lastly, the Author has to 

 express his thanks to his friends, Mr Henry B. Brady, F.K.S., 

 Dr Eamsay H. Traquair, F.E.S.E., and Mr E. Etheridge, jun., 

 F.G.S., for much valuable and friendly assistance. 



UNITED COLLEGE, ST ANDREWS, 



September 10, 1879. 



