PART XX, — Jul 1921 on i Price 3s. 6d. net. 

“GERALD E. H. BARRETT-HAMILTON 
B.A.(CANTAB.), M.R.I.A., F.Z.S. 
AND 
MARTIN A. GC. HINTON 
BRITISH MUSEUM OF NATURAL HISTORY 
ss WITH MANY FULL-PAGE PLATES IN COLOUR, IN BLACK AND WHITE, AND 
i wat NUMEROUS ILLUSTRATIONS IN TEXT 
DRAWN BY 
EDWARD A. WILSON xD GUY DOLLMAN 
iS ' ) B.A., M.B. (CANTAB.) BRITISH MuszuM oF NATURAL History 

GURNEY AND JACKSON 
33 PATERNOSTER ROW, LONDON, EC, 
1921 

