128 ALBATROSS EXPLORATIONS, BIRDS RIDGWAY. 



14. Pcecilonetta galapagensis Ridgw. 1 Charles Island. 



15. Zenaida galapagoeusis Gould . Duncan and Hood Islands. 



16. Hsematopus galapagensis Ridgw. 2 James Island. 



17. Hiraautopns niexicauus (Mull.). James Island. 



18. Areuaria interpres Linn. Hood Island. 



19. Heteractitis incauus (Gin.)- James and Hood Islands. 



20. Lams fuliginosus Gould. Chatham Island. 



21. Spheniscus mendiculus Suudev. Albemarle Island. 



The following species have definite localities for the first time assigned 

 them: 



1. Pelecanus californicus Ridgw. 3 Chatham Island. 



2. Anous stolidus (Linn.). Chatham Island. 



3. Anous galapagensis Sharpe. Chatham and Hood Islands. 



The following species were obtained from new localities by Dr. Wil- 

 liam H. Jones, U. S. N., in 1884: 



1. Buteo galapagoensis (Gould). 3 Chatham Island. 



2. Butorides plumbeus (Suudev.). Chatham Islaud. 



3. Zenaida galapagoensis Gould. Chatham Island. 



4. Hseruatopus galapagensis Ridgw. Chatham Island. 



It is very evident from the above showing that the avifauna of the 

 Galapagos Archipelago is by no means exhausted as a field for promis- 

 ing research in the problem of the "derivative origin of species." 

 Future explorations will no doubt add new species and extend the 

 range of those already known. The largest islaud of the group, Albe- 

 marle, is still almost untouched, only four species having as yet been 

 collected there; two islands (Wenmau and Culpepper) have not been 

 explored at all, while it can safely be said that on none of the islands 

 has anything like a thorough investigation of the bird-fauna been 

 made. The many interesting problems yet to be worked out will re- 

 quire a careful exploration of every islaud, by some one competent to 

 study carefully and intelligently each species in relation to its con- 

 geners and its conditions of environment; its differences of plumage 

 according to sex, age, and season, and to what extent, if any, migration 

 from one island to another takes place. Many changes in the bird- 

 fauna of these islands have doubtless been wrought by the hand of 

 mau, through destruction of birds for food, and disturbance by the 

 introduction of domestic animals ; therefore, it is earnestly to be hoped 

 that the subject may receive the careful attention which its importance 

 merits before these changes have gone so far as to render investigation 

 more difficult and its results less satisfactory. 



1 = Dafila bahamcnsis Salv., Anas ballamensis Suudev. ? 

 - =Ha'.matopu8 palliatus of Salvin and Sundevall ? 

 3 —P. fuscus of Salviu and Sundevall ? 



