Zoological Society oj London. 
478 
which are nearly pure black; under tail-coverts black in the 
centre and pure white on the sides; frontal plate orange; base of 
the bill blood-red ; tip greenish-yellow ; above the knee a garter 
of yellow and scarlet; joints of the legs and feet green ; under 
surface of the legs and feet olive; the sides of the tarsi and frontal 
plates of the toes yellow ; frontal plates of the tarsi yellow; those 
nearest the knee stained with scarlet; irides olive. 
Total length, 15 inches; bill, 1^; wing, 8; tail, 3; tarsi, 2J. 
Hab. South Australia. 
Remark. —The above is the description of a female ; the male 
is supposed to be larger in size, and to differ in being of a paler 
hue beneath, and in having the whole of the upper surface brown. 
Sylociielidon strenuus. Syl. fronte verlice etnuchAnitidb 
nigris ; dorso alis cauddque pallidb cinereo-griseis ; reliquis 
plumis albis. 
Forehead, crown and nape deep glossy black; back, wings and 
tail pale ashy grey, becoming lighter on the tail and deepening 
into dark grey on the primaries, the shafts of which are white; 
remainder of the plumage pure white; irides black; bill scarlet, 
stained with yellow on the sides and tip, and with greenish yellow 
near the extremity. 
Total length, 20£ inches; bill, 4; wing, 16J ; tail, 6|; tarsi, 2. 
Hab. Southern coasts of Australia. 
Remark. —The above is the description of the plumage of the 
breeding season ; at other times the head instead of being wholly 
black is mottled with black and white. 
Sula personata. Sul. alba ; tectricibus alarum majoribus, 
secundariis, tertialibus , rectricibus lateralibus, et rectricum 
intermediarum apicibus, intensd fuscis. 
The whole of the plumage pure white, with the exception of the 
greater wing-coverts, primaries, secondaries, tertiaries, the tips of 
the two central and the whole of the lateral tail-feathers, which 
are of a rich chocolate-brown ; irides yellow; naked skin of the 
face and chin in dead specimen dull bluish black ; legs greenish 
blue. 
Total length, 29 inches ; bill, 5 ; wing, 16£ ; tail, 8£ ; tarsi, 2|. 
