320 
Sp. 131. 
Sp. 132. 
Sp. 133. 
Mr. Jenyns on the Ornithology of Cambridgeshire. 
some of these individuals no such alteration had taken place, the 
forehead, space between the bill and the eyes, throat, and forepart 
of the neck being as white as at other times of the year, so 
that this periodical change of plumage cannot be looked upon as 
constant. Possibly however it may be confined to one sex. On 
the 8th of July a nest of this species was taken, which was 
perfectly flat, placed on the ground, about six inches in diameter, 
and composed of roots and dry grass, which appeared to have 
been trodden down so as to be rendered quite firm and compact. 
The eggs were two in number, of an olive-green colour, thickly 
spotted and blotched with deep brown, especially towards the 
larger end. These. had been ineubated some days. Montagu 
observes that this bird is known in some parts of Cambridgeshire 
by the name of Car-swallow. 
Genus LI. LARUS, Linn. 
L. marinus, Temm. Man. @Ornith. p- 76 
Great Buack-BacKED GuLuL.—There is an adult bird of this 
species in the collection of. Dr. Thackeray, which was procured 
in the Cambridge market. 
L. argentatus, Temm. Man. daraith. p. 764. 
Srrvery Guitui—Towards the middle of December 1824, several 
Gulls in. immature plumage were shot at Overcote near Swavesey 
in this county, which I believe to have been the Larus argentatus 
of Temminck, which is synonymous with the Herring Gull of 
Latham and Montagu: but owing to the strong resemblance 
between the young of this species, and those of the preceding, and 
of the L. fuscus Temm. it was impossible to identify them with 
complete certainty. One of these specimens is preserved in the 
Museum of the Cambridge Philosophical Society. 
L. canus, Temm. Man. d’Ornith. p.771. 
Common Gutu.—Met with occasionally in the fens, but chiefly 
during the autumnal and winter months. Its provincial name is 
Coddy-Moddy. 
