IV PREFACE. 



together, an Appendix on the structure of Birds and a series of 

 25 Plates. A First Edition of Part I., without the Appendix 

 and the Plates, appeared in 1905. The present Guide is 

 practically a reprint (with a few verbal corrections) of that 

 issue, with the addition of the Appendix and Plate XXV. 

 Plates I.-XXIV. can be purchased separately (price Is. 6d.). 



The statements in the Preface to the First Edition are no 

 longer completely in accordance with the method of labelling 

 adopted in the Bird Gallery. 



SIDNEY F. HARMER, 



Director. 



British Museum (Naxubal Histoht), 

 Cromwell Road, 

 London, S.W. 7. 

 March, 1921. 



