374 
APPENDIX. 
GYGIS CANDIDA, Gmelin. 
White Tern. 
Gould, Handbk. lids. Ausl., Yol. ii., sp. 609, p. 405. 
The single egg laid by this bird for a sitting is deposited in a 
slight cavity or roughened surface on the bare branch of a tree, 
usually at a considerable distance from the shore in some valley 
or sheltered situation. Unlike Auous inelanogenys, (G. R. Gray) 
this bird does not breed in colonies, but returns season after 
season to the same place and tree to deposit its egg, although they 
may be repeatedly taken. The trees usually selected are Lagnnaria 
palersoni, Noteldta longifulia, and Jlaloghia Incida.* Two eggs 
taken by Dr. Metcalfe are oval in form and nearly equal in size 
at both ends ; one is of a stony-buff ground colour, thickly freckled, 
spotted, and splashed all over with different shades of brown and 
greyish-black, the latter colour appearing as if beneath the surface 
of the shell, in some places these markings are confluent forming 
large irregular-shaped patches on the shell; length DG7 x 1 '24 
inch. The other has a light greenish-grey ground colour, which 
is almost obscured by thick irregularly-shaped linear markings 
and smears of umber-brown, and nearly obsolete dashes of deep 
bluish-grey. Length 1-71 x 1*22 inch. 
Ilab. Norfolk Island. 
STERNA FULIGINOSA, Gmelin. 
Sooty Tern. 
Gould, Ilandbk. Bds. Ausl., Vol. ii., sp. Gil, p. 408. 
This bird was found breeding on the rocky ledges and flat parts 
of the cliffs, but more often on the bare sand ; little or no attempt 
was made at forming a nest, except in a few instances whore a small 
portion of debris was found scraped around the single egg laid by 
thkTbmTYor a sittiiy^ Mr. Saunders who visited the island during 
the breeding season, collected a large number of the eggs during 
* Crowfoot, Ibis, 1885, p. 2G7. 
