OF THE NETHERLANDS. 



151 



Hybrid between Fuligula fuligula (L. ) X Fuligula 

 marila (L.). 



A female cross of these species has been killed on Texel, 

 19 February 1897, and was presented to our collection by 

 the late Herman Albarda. The colour and markings of the 

 uppersurface are between those of fuligula and marila] the 

 crest is developed ; the undersurface is more like that of 

 marila, vermiculations on the feathers of the abdomen 

 remember at marila) the bill is much smaller than that of 

 marila, but a little larger than that of fuligula ; iris yellow ; 

 wing 200 mm. 



57. Fuligula marila (L.). [Toppereend]. 



We purchased a fine series of 24 specimens killed in 

 the uionths September till March, on inland waters as 

 well as at the seacoast. 



Accordiug to the late H. Schlegel a specimen of the 

 american Fuligula afflnis Eyton should have been killed in our 

 country (Schlegel, Cat. Anseres, Fuligula affinis, n°. 7). This 

 specimen, a female, shot 21 December 1859 at Katwijk, is 

 still in our collection. I have compared this example with 

 our specimens of affi?ris from North-America and with our 

 series of marila and I am convinced that the specimen 

 does not belong to affinis, but that it is a true marila. 

 A female marila, shot 12 November 1904 on Texel, even is 

 smaller than this specimen. The white surrounding of the 

 bill in Schlegel's specimen is also too extensive for affinis. 



In January 1897 the late Herman Albarda presented 

 to our collection a female duck, shot 13 January 1897 on 

 Texel, which he thought to be a cross of Fuligula marila 

 (L.) and Clangula clangula (L.). With this determination 

 I cannot agree, as the bird is in every respect a female 

 of marila, except in its abnormal small white collar on 

 the foreneck. 



Notes from the Leydeu Museum, Vol. XXX. 



