IV 
PREFACE. 
The figure in brackets after the Latin name refers to the 
t Catalogue of Birds in the British Museum.’ I have also in 
many cases given the quotation where the bird is figured. 
The work was completed in 1925, but, as I remarked, galley- 
sheets were sent abroad ; therefore, the printing has been finished 
in sections—for example, pp. 1—112 were finally printed off in 
January 1926. This will explain the long list of corrections. 
The admission of genera is a matter of opinion. I have in some 
cases left the super-genera, as Phaethon. 
I have endeavoured to fix the type-locality of every quotation 
and the genotype of each genus. 
Foulis Court, Fair Oak, Hants. 
March 1927. 
GREGORY M. MATHEWS. 
