Birds of Celebes: SuUdae. 
891 
Eggs. Elongated ovals, pale bluish wlute, tliickly coated with lime: 53 — 54x 36 — 37 mm 
(North d 2). 
Distribution. Australia (Gould, Eamsay IT, b 1, d 1)\ New Guinea, Kei, Aru, Amboina, 
Ceram, Batchian, Halmahera (see Salvador! c 2)\ Flores (Weber a 5)\ Celebes — 
Lake Limbotto (v. Musschenbroek a, 4)\ South Borneo (Croockewit a 8, c 3)-^ 
Lombok (Everett 3). 
An example of an entirely dark-coloured species of Cormorant was obtained 
by van Musschenbroek at Limbotto and was somewhat doubtfully determined 
by him as P. sulcirostris. 
We were much interested to learn from Mr. Biittikofer that this specimen 
is in the Leyden Museum and that it is a true P. sulcirostris. Von Rosenberg 
(Zool. Garten 1881, 167: indicated no fewer than six P. sulcirostris as having 
been shot by him and his hunters at Limbotto, but the indication has been 
much questioned by Prof. W. Blasius (J. f. O. 1883, 127; Ztschr. ges. Orn. 1886, 
174), who suggested that they were P. melanoleucus and with perfect right. Mr. 
Biittikofer writes that van Musschenbroek’s example “is the only specimen 
of P. sulcirostris known to me from Celebes. The specimens recorded by von 
Rosenberg under this name from Celebes all belong to P. melanoleucus-, they 
make part of our collections!” 
When adult this species is easily distinguished from P. melanoleucus by its 
entirely green-black plumage, as well as by its bill, which is weaker, with the 
culmen much broader and more rounded. We are not acquainted with the 
young of P. sulcirostris, but that of P. javanicus is brown above and pale grey 
on the under parts, much as that of P. pygmaeus. The adult P. javanicus is 
distinguished by its white upper throat and small bill and the absence of white 
spots on the head; P. pygmaeus by its chestnut head and upper neck, and the 
small white longitudinal spots on the under surface and lower neck. 
FAMILY SULIDAE. 
The bill of the Gannets is longer than the head, large at the base, taper- 
ing towards the tip, without external nostrils, the tomia serrated for the terminal 
half; more or less of the upper throat and base of jaw naked; tarsus shorter 
than the toes, the middle toe with the serrated claw slightly longer than the 
outer one; wings long, about twice the length of the secondaries; tail moderate; 
a “system of subcutaneous air-cells, some of large size, pervading almost the 
whole surface of the body, communicating with the lungs, and capable of being 
inflated or emptied at the will of the bird” (Newton, D. B. 1893, 303). 
GENUS SULA Briss. 
Description as for the family. 
112 * 
