NATATORES. 



253 



when spread.* Legs, toes and webs flesh-colour; 

 nails dark brown. 



The measurements as follows : f — 



It will be seen, from the above description, that it 

 applies to a bird of the year, and it is somewhat 

 remarkable that none but immature examples of this 

 species have hitherto been met with in Great Britain, 

 all of which were obtained in autumn. 



The bird now under consideration differs from 

 that described by Mr. Thompson in the following 

 particulars: — the "space immediately above the 

 eye," instead of being " white," is pale grey ; the 

 *' under part of the throat and upper part of the 

 breast," instead of being " pale ash-colour," is white ; 



* This is, probably, sufficiently conspicuous when the 

 bird is flying to afford a ready means of distinguishing it. 



f It is proper to state that these measurements were 

 taken after the bird was stuffed, and cannot, therefore, be 

 considered as quite exact. 



