On Colymbus adamsi in Norway. 269 



least idea that such was the habit ol: the Chaja. On wading 

 into the watei% and approaching the birds, I was, however, 

 soon convinced, both from tlieir appearance and voice, that 

 they were really Chajas. They allowed rae to approach within 

 easy gun-shot, when they rose heavily and flapped slowly to 

 the bank, where they alighted. That they had a nest 

 among the reeds in the middle of the laguna I felt assured, 

 but the depth of water prevented my wading to the spot. I 

 had, however, reason to believe that the young were already 

 hatched and swimming about among the reeds, so that, 

 had I succeeded in reaching the nest, my labour would have 

 been in vain. 



As soon as I reached the shore, the Chajas once more 

 returned to the water, and recommenced swimming about 

 among the Ducks. During several subsequent visits to the 

 same spot, I nearly always saw the birds swimming far out 

 in the water ; and, indeed, I think it was only once or twice 

 that I observed them on land. It is therefore evident that 

 during the nesting-season this pair of Chajas should be 

 described as thoroughly aquatic in their habits. 



I hope to pay another visit to the same hospitable estancia 

 in July or August next (the Argentine winter), and shall then 

 not fail to find out whether my friends the Chajas are at 

 that season as fond of the laguna as they were in the early 

 summer. 



XX. — On the Occurrence of Colymbus adamsi in Nurivay. 

 By Prof. R. Collett, F.M.Z.S. 



(Plate VIII.) 



The large Diver first named by G. R. Gray (P. Z. S. 1859, 

 p. 167) Colymbus adamsi, from specimens obtained by Mr. 

 Adams, surgeon of H.M.S. 'Enterprise,' during a voyage 

 of that vessel through Behring Strait, visits the coasts of 

 Norway annually, especially during the autumn and winter, 

 in some years even in considerable numbers, and specimens 



