THE BIRDS OF AUSTRALIA. 
The Australian form is separable from the typical one by the greyish wash 
on the abdomen, under tail-coverts, and under wing-coverts ; the streamers are 
also much more developed than in any Atlantic bird I have seen, and generallv 
they are of a larger size. In respect to wing-length, I had the same experience 
as that recorded by Rothschild and Hartert with their Galapagos birds {Nov. 
Zool., Vol VI., p. 191, 1899). I should consider the Galapagos birds separable 
and also the Laccadive ones, but long series are absolutely necessary to work 
out the subspecies of this bird. 
A tentative nomenclature would be : — 
Onychoprion fuscatus fuscatus Linne ; Atlantic Ocean. 
Onychoprion fuscatus infuscatus Lichtenstein ; East Indian Ocean. 
Onychoprion fuscatus serratus Wagler; Australian seas. 
Onychoprion fuscatus oaJiuensis Bloxham ; Hawaiian group. 
I note that Bangs {Bull. Mus. Ccunp. Zool., Harvard, Vol. XXXVI., 
p. 256, 1901) used S. f. crissalis Lawrence for Liu Kiu birds ; but Lawrence’s 
name was introduced for Tres Maria birds, and if the North Pacific birds are 
all considered referable to one subspecies, Bloxham’s name has priority. 
Forster’s S. guttata was given to an Easter Island bird, Reichenbach’s 
8. gouldii to a West Australian bird, Philippi and Landbeck’s 8. luctuosa refers 
to a Chilian bird, while H. somalensis Heuglin was given to a Somaliland bird, 
so that there are stiU names for most of the apparently separable forms. 
