141 [Vol. xli. 



Note. The two birds from Devonshire have been referred 

 to as P. p. yelkouan in Godinan's ' Monograph of the Petrels,' 

 but obviously belong to this overlooked race from the 

 Western Mediterranean. The breeding-locality of P. p. 

 mauretanicus will probably be found to be either the Island 

 of Alboran or the Habbas Islands. It is doubtful if records 

 of P. p. yelhouan from the British Isles are correct. 



Mr. Robert H. Read exhibited two nests of Mistle-Thrush 

 as interesting examples of adaptation to environment. One, 

 made externally of a great mass of hoary tree-lichens, was 

 taken from the upper branches of an old apple-tree in 

 Somerset covered with the same material. The other, taken 

 from the lower fork of a lime-washed af)ple-tree in Kent, was 

 covered externally with a mass of white wool to correspond 

 with its surroundings. 



Mr. P. F. BuNYARD exhibited two clutches of four, and 

 thi'ee clutches of three eggs of the Solitary Sandpiper, Tringa 

 solitarius, from Alberta, May 28th-June 6th ; all from old 

 nests of the American Robin, Turdus migratorius : also two 

 typical clutches of the Yellowshank, Tringa flavipes, from 

 Alberta, and Saskatchewan, June 1 and 6. 



Previous to 1904 the eggs of the Solitary Sandpiper were 

 unknown. They were first described and figured in this 

 country in the ' Ibis ' for 1907. Those exhibited repre- 

 sented the two known forms, i. e. those with the greenish 

 and brownish ground, both of which were figured in the 

 ' Ibis.' The eggs of the Wood and Solitary Sandpiper very 

 closely resemble one another, as one would naturally expect 

 from two such closely allied species — those of T. solitarius^ 

 however, are slightly smaller. 



Dr. F. M. Chapman, Curator of Ornithology in the 

 American Museum of Natural History, New York, then 

 addressed the Club on the subject of "" The Origin of Andean 

 Bird- Life, with special reference to Altitudinal Life-Zones." 



Having outlined the chief features of the problem pre- 

 sented by the effect of the elevation of the Andes on the 



