560  . Mr. N. A. Vicors on the 
bidè ferruginea, isto nigro-lineato, hoc parc nigro-sparso. 
Pectus, dorsum, uropygium, abdominisque latera fusca ferru- 
gineo-marginata. Abdomen subtus album.  Rectrices me- 
diæ fuscæ, lateralibus haud longiores. Alæ, pedesque ut in 
mare. ` 
Longitudo corporis, rostro incluso, 154; rostri ad frontem 147, ad 
rictum 2 ; ale a carpo ad remigem secundam 81 ; tarsi 1%. 
In Mus. nost. 
''he male of this species was first described by Mr. Pennant in 
his “ British Zoology," under the name of Bimaculated Duck, and 
introduced as an inhabitant of the British Islands in the following 
words :—** Taken in a decoy in 1771, and communicated to me 
by Poore, Esq.*" The same bird was afterwards described 
and figured by Dr. Pallas in the “Acta Stockholmiensia" for 1779 
as a native of Siberia, frequenting Lake Baikal and the River 
Lena; and was named by him Anas glocitans. On the autho- 
rity of Mr. Pennant* the species has subsequently been included 
among the Birds of Great Britain by writers on British Orni- 
thology ; but no further account has reached us of the speci- 
men alluded to by that distinguished naturalist, nor has it been 
ascertained whether it was preserved after it was communicated 
to him. "The specimens of both male and female, from which I 
* Vol. ii. p. 603. 
+ Itake Mr. Pennant's authority (see Arctic Zoology, p. 575.) for determining that 
his Bimaculated Duck and the Anas glocitans of Dr. Pallas are the same species. 
From the figure given in the “Acta Stockholmiensia,” I could scarcely myself draw 
that conclusion ; the round spots on the side of the head in the former species being 
superseded by long narrow stripes in the figure of the latter; while the tail is com- 
pletely rounded, the two middle feathers not being longer than the rest. Mr. Pen- 
nant's own figure of this bird is an excellent representation. I must here notice what 
appears to be a slight difference between our two birds. In the British Zoology the 
species is described as having twelve tail-feathers : in my specimens, both of male and 
female, there are sixteen. ; 
have 
