iv PREFACE 



of London, the United States National Museum, and Major 

 Stanley S. Flower for other figures, as indicated in the 

 respective legends. Their thanks are also due to Dr. J. 

 Biittikofer and to Mr. F. A. 0. Pym for photographs which 

 have served as the originals of other figures, and to the 

 Duchess of Bedford and to Mr. E. I. Pocock, F.E.S., for 

 information about certain specimens. 



SIDNEY F. HAPtMEE, 



Kee'per of Zoology. 



British Museum (Natural History), 

 London, S.W. 



January 26th, 1916. 



