204 ON BIRDS FROM THE NETHERLANDS. 
Podiceps nigricollis Brehm. 
Of this species I received three males in winter plumage, 
shot near Texel 27 December 1909, 1 and 15 January 1910. 
Colymbus imber Gunnerus. 
The great northern diver is a rare visitant to our 
country. This winter I received a young male, shot 27 
December 1909 on the Marsdiep near Texel, which is the 
first specimen I saw in flesh. The bill is dusky grey with 
blackish culmen. We have now four specimens, without 
doubt killed in our country, among which one specimen, 
a male, in full dress. 
Oceanodroma leucorrhoa (Vieillot). 
Two specimens of Leach’s petrel have been purchased: 
a female, caught alive 16 November 1909 on Texel and a 
male, netted near Westernieland, Groningen, 22 Novem- 
ber 1909, 
Sula bassanus (L.). 
We received six adult specimens, males and females; one 
male, shot 8 November 1909 near Texel, having back and 
wingcoverts still mottled with black; a female was caught 
alive on Texel at the 26th of April 1910. 
Egatheus falcinellus (L.). 
Plegadis faleinellus (L.). Notes Leyden Mus. XXX, 1908—’09, p. 138. 
Two females were shot at Pernis, Zuid-Holland, 5 No- 
vember 1909 and purchased for our collection. We received 
also a fine male, shot 4 December 1909 near Giethoorn, 
province Overijssel. 
Aythia nyroca (Güldenstädt). 
We received one specimen, a female, shot 30 October 
1909 at Nieuwkoop, and three specimens, a male and two 
females, shot 238 August 1910 at Nieuwkoop. 
Notes from the Leyden Museum, Vol. XXXII. 
