PEEFAOE. 



Since the last edition of the " Guide to Fossil Mammals 

 and Birds" was published in 1896, the additions to the 

 collection have been so numerous, and knowledge has 

 advanced so much, that the book has now been entirely 

 re-written by Dr. Arthur Smith Woodward, the Keeper of 

 Geology. The present issue, however, retains all the original 

 features of the Guide, and is not in any sense a systematic 

 treatise. Its arrangement is determined by that of the cases 

 and specimens, and it sometimes refers to trivial details 

 which are of interest solely to visitors actually in the 

 Galleries. 



As fossils can only be understood by those who have 

 some acquaintance with the existing world of life, this 

 Guide assumes on the part of the reader at least as much 

 elementary knowledge as is contained in the Guides to the 

 Department of Zoology. 



Many of the specimens bear small discs of green or red 

 paper. Those marked with green discs are either "type- 

 specimens," or have been described and illustrated in some 

 scientific work, to which a reference is given on the label. 

 Those marked with red discs have been merely noticed or 

 briefly described in print. 



E. EAY LANKESTEK, 



Director. 

 May, 1904. 



