Vol. II, Pt. I] GIFFORD— BIRDS OF THE GALAPAGOS ISLANDS 5 



In the few places where moults and plumages have been dis- 

 cussed, the plan followed is essentially Dr. Dwight's as set 

 forth in various papers. A few changes in names of moults 

 and plumages were necessitated by the fact that the Galapagos 

 Islands are under the equator, and the word "winter" cannot 

 be used to advantage. The appended list gives the order of 

 plumages and moults. The unnumbered plumages and moults 

 placed in square brackets are those peculiar to certain birds, 

 such as some of the Galliformes, the Procellariiformes, the 

 Lariformes, the Phoonicopteriformes, and the Anseriformes. 

 Wherever the nomenclature differs from that of Dr. Dwight, 

 his is placed in parentheses. 



1. Natal Plumage. 



2. Postnatal Moult. 



[Second Downy or Postnatal Plumage.] 

 [Prejuvenal Moult.] 



3. Juvenal Plumage. 



4. Postjuvenal Moult. 



[Preliminary Postjuvenal Plumage (Dvi^ight's First Win- 

 ter Plumage — Preliminary).] 

 [Supplementary Postjuvenal Moult.] 



5. Postjuvenal Plumage (Dwight's First Winter Plumage; also 



his First Winter Plumage — Supplementary). 



6. First Prenuptial Moult. 



7. First Nuptial Plumage. 



8. First Postnuptial Moult. 



[First Preliminary Postbreeding Plumage (Dwight's Sec- 

 ond or Adult Winter Plumage — Preliminary; Eclipse 

 Plumage).] 



[First Supplementary Postnuptial Moult.] 



9. First Postbreeding Plumage (Dwight's Second Winter 



Plumage; also his Second or Adult Winter Plumage — 

 Supplementary). 



10. Second Prenuptial Moult. 



11. Second Nuptial Plumage. 



12. Second Postnuptial Moult. 



The following remarks are necessary in regard to the meas- 

 urements given. Lengths and extents were taken in the field 

 from specimens before skinning. Wing-measurements are 

 from the "bend" or carpal joint to the tip of the longest 

 primary, the rule being laid along the outer or convex side, and 

 the wing brought up close to it for its entire length. In four 

 cases {Nesopelia galapagoensis, Creciscus spilonotus, Gallinula 

 galeata, and Spheniscus mendicuhis) , however, the wing was 

 measured with dividers, one point resting against the anterior 

 side of the bend, the other touching the extremity of the long- 

 est primary. 



