376 The Birds of Mas-afuera and Juan Fernandez. 



pear to be allied ; but (E. maculata, with other differential 

 charactei'Sj is said to have the whole head white, which must 

 distinguish it from (E. externa. (E. maculata is said by 

 its describer to be found on Juan Fernandez, and to breed 

 on Mas-afiiera; but it has not since been recognized*. CE. 

 defilippiana is from the same seas, having been taken during 

 the voyage of the 'Magenta' in lat. 18° 4' S., long. 79° 35' 

 W., and between Callao and Valparaiso. 



Of (E. externa three specimens were sent, one adult and 

 two young, partly in grey down and partly feathered. The 

 latter are in a specially interesting state, as they show that 

 the young assume the precise plumage of the adult with their 

 first feathers. 



Before leaving the Petrels of these islands, I may mention 

 that I have lately acquired specimens, obtained by Mr. Reed 

 on Juan Fernandez, of a species which I make out to belong 

 to that described as Puffinus creatopus by Dr. Coues from a 

 single specimen, obtained by Dr. Cooper off the coast of Cali- 

 fornia (Proc. Ac. Phil. 1864, p. 131). 



Dr. Coues's description is so good that I feel very confident 

 in the determination of the species, notwithstanding the vast 

 distance intervening between Juan Fernandez and the island 

 where the type was obtained. Mr. Reed speaks of having 

 found Thalassoeca glacialoides in numbers on Juan Fernandez. 

 As his skins belong to Puffinus creatopus, possibly it was this 

 bird that he referred to. I have, too, a specimen of Daption 

 capensis from the same island. 



The following is a revised list of the birds of these two 

 islands : — 



1. Turdus falklandicus , Juan Fernandez and Mas-afuera, 



2. An(Bretes fernandezianus, Juan Fernandez. 



3. Oxyurus masafuera, Mas-afuera. 



4. Cinch des f us cus, Mas-afuera. 



5. Eustephanus galeritus, Juan Fernandez. 



* It appears to me doubtful, on reading Tschudi's description of this 

 bird, if it is really, as Dr. Coues supposes, referable to the genus (Estre- 

 lata. Its yellow bill and legs recall Thalassoeca glacialoides ; all CEstrelatct 

 have, so far as I know, the bill black. 



