AUSTRALIAN WHITE-CAPPED NODDY. 
dark reddish, brown ; nails black. Length 355 millimetres ; wing 222 ; tail 120 ; exposed 
culmen 43 ; bill from nostril 31 ; tarsus 21 ; middle toe with claw 38. 
From the preceding it will be seen that the Pacific forms are fairly well 
provided with names, while the Atlantic bird is nameless. 
I propose the following nomenclature to be used, as more in accordance 
with the facts than a binomial one : — 
Megalopterus minutus minutus (Boie) ; North Australia (breeding), 
Norfolk Island, and Kermadec Islands (breeding). 
Of this form A. leucocapillus Gould and A. atrofuscus Stone must be considered 
synonyms. When this latter name was introduced Stone wrote (p. 116) : 
“ The sooty brown-black species so weU figured and described by Mr. Saunders 
[P.Z.S, 1876, pi. LXi., fig. 3) as 'A. leucocapillus Gould ’ seems to be the most 
distinct of the three, but is, so far as I can ascertain, unnamed. I therefore 
propose for it the name of A. atrofuscus P That was a young bird from the 
type-locality (very nearly) of A, leucocapillus Gould. Two pages later he 
named a bird supposed to have come from Monte Video as type, but I accept 
the first-named entry. 
Megalopterus 7ninutus worcesteri (McGregor) ; Philippine Islands. 
Megalopterus ininutus inarcusi (Bryan) ; Marcus Island, Mariannes ? 
Megalopterus ininutus inelanogenys (Gray) ; Hawaiian group. 
Of this form A. Jiawaiiensis Kothschild must fall as a synonym. 
Megalopterus minutus diamesus (HeUer and Snodgrass) ; 
Cocos and Clipperton Islands. 
Megalopterus 7ninutus ainericanus, subsp. n. ; 
Caribbean Sea, British Honduras. 
A good series of this form is available, and it is quite close to M. m. 7ninutuSj 
but is easily separated by means of its stouter bill and browner tail, while 
there is less bluish-plumbeous on the upper-back and throat. 
Megalopterus 7ninutus atlanticus^ subsp. n. ; 
Ascension Island, St. Paul’s Bocks, Fernando, Noronha. 
A long series from Ascension Island show these birds to have absolutely 
longer stouter bills ; the white not descending on to the shoulders but being 
restricted to the crown of the head ; the wings are longer, and the tail is 
noticeably blackish. A number of birds from St. Paul’s Rocks agree, but 
may be separable as the bill is shorter, though very stout, and they are 
somewhat darker throughout. The type is from Ascension Island. 
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