45 
in the Chuput Valley, Patagonia. 
in the habit of nesting close to the sea, it would scarcely be 
found breeding so far inland. 
Larus dominicanus. 
Not uncommon about the mouth of the river, but seen also 
at Ninfas Point. I obtained specimens in both adult and 
immature plumage. Two adult birds from the river Chuput 
differ from an adult specimen from Buenos Ayres in the re¬ 
spective size of their beaks and tarsi, but otherwise they are 
precisely similar. The Buenos-Ayres bird is the larger. 
PoDICEPS ROLLANDI. 
Common in almost every pool and ditch in the valley. 
PoDICEPS CALIPAREUS. 
On the 6th November I saw two in the large lagoon to the 
north of Chuput, and during a second visit on the 11th was 
fortunate enough to find them again in a ditch bordering the 
lagoon, from which it was separated by a narrow strip of sand. 
Both of these I procured; and they proved on dissection to 
be male and female. The former is considerably the larger; 
the breast and stomach are of a purer white; the feathers on 
the crown of the head and throat are of a lighter grey; and 
those behind the eyes and ears, forming a sort of ruff, are 
longer than in the female bird. I did not observe this species 
again. 
Nothura maculosa. 
Not so common' as Calodromas elegans, but occasionally 
seen amongst the thick grass and rushes bordering the river. 
Not seen on the hills. 
Calodromas elegans. 
Common both in the valley and on the hills in very dry 
spots. It nests under the shelter of a small bush, and after 
scraping a slight hollow in the ground, lines it with a few 
fragments of grass and feathers, laying sometimes as many 
as ten eggs. The remarkable character of these, of a uniform 
pea-green colour, with a highly polished appearance, is well 
known. About dusk these birds come from the shelter of 
