PREFACE 



Tins uintli edition of the " Cxuide to Fossil Maininals and 

 Birds " difters very little from the eighth, which was entirely 

 re- written in 1904. It still remains merely a Guide, and is 

 not in any sense a systematic treatise. As fossils can only 

 1)6 understood l»y tliose who have some acquaintance with 

 the existing world of life, it assumes on the part of the 

 reader at least as mucli elementary knowledge as is con- 

 tained in the Guides to the Department of Zoology. Its 

 arrangement is determined hy that of tlie cases and 

 specimens, and it sometimes refers to trivial details which 

 are of interest solely to visitors actually in the Galleries. 



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 l)een merely noticed or 

 briefly described in print. 



A. SMITH WOODWAED, 



Keeiicr of Geolojiy. 

 February, 1909. 



