OF THE GALAPAGOS AECHIPELAGO. 



465 



Of these 57 species 19 only have as yet been found outside the limits of the archi- 

 pelago, leaving 38 species peculiar to the islands, or more than 66 per cent. 



Putting aside 21 of the 57 species, being the sea- or shore-birds, we have a remainder 

 of 36 land-birds ; of these 36 species only four, with our present knowledge, can be 

 said to inhabit exclusively one island. These are Mimus parvulus of Albemarle Island, 

 Geospiza diihia of Chatham Island, Cactornis abingdoni of Abingdon Island, and Cac- 

 tornis pallida of Indefatigable Island. Very little can be said to be known of any of 

 these four species ; so that it is quite probable that they too may occur in other islands. 

 It Avill be seen, then, that Mr. Darwin's remarks on the internal distribution of the birds 

 of the archipelago require modification, and that certain species have not the exceed- 

 ingly restricted range that he supposed. 



With regard to the 19 widely ranging species, we see that 9 of them are solely 

 American, the remainder being American also but at the same time more extensively 

 distributed. 



Distribution of the Genera of Birds found in the Galapagos. 



1. Mimus . 



2. Dendrceca 



3. Progne . . 



4. Certhidea 



5. Geospiza . . 



6. Cactornis . 



7. Camarhynchus 



8. Dolichonyx . 



9. Pyrocephalus 



10. Myiarchus . 



11. Asia . . . 



12. Strix. . . 



13. Buteo . . . 



14. Pelecamis 



15. Sula . . . 



16. Fregata . . 



17. Phaeton . . 



18. Ardea . . 



19. Butorides 



20. Nycticorax . 



North and S. America. 



North and Central Ame- 

 rica and West Indies. 



North and S. America. 



Galapagos. 



Galapagos. 



Galapagos. 



Galapagos. 



North America. 



South America. 



North and S. America. 



Cosmopolitan. 



Cosmopolitan. 



Cosmopolitan. . 



Cosmopolitan. 



Cosmopolitan. 

 , Tropicopolitan. 

 . Tropicopolitan. 

 , Cosmopolitan. 

 . Tropicopolitan. 

 , Cosmopolitan. 



21. Phmnicopterus . Tropicopolitan. 



22. Querquedula . Cosmopolitan. 



23. Dafila. . 



24. Zenaida . 



25. Porsana . 



26. JEgialitis 



27. Hmmatopus 



28. Himantopus 



29. Strepsilas 



30. Calidris . 



31. Heterosceles 



32. Tringa . 



33. Numenius 



34. Anous 



35. Larus. . 



36. Creagrus . 



37. (Estrelata 



38. Procellaria 



39. Spheniscus 



. Cosmopolitan. 



. South America. 



. Cosmopolitan. 



. Cosmopolitan. 



. Cosmopolitan. 



. Cosmopolitan. 



. Cosmopolitan. 



. Cosmopolitan. 



. Shores of North and South 



Pacific Ocean. 

 . Cosmopolitan. 

 . Cosmopolitan. 

 . Tropicopolitan. 

 . Cosmopolitan. 

 . Galapagos'. 

 . Cosmopohtan. 

 . Cosmopolitan. 

 . Antarctic Seas. 



It will be seen from this table that 27 out of the 39 genera of birds represented in 

 the Galapagos Islands are of very wide distribution. Of the remaining 12, 7 are found 

 in continental America, leaving 5 peculiar to the islands. It is the presence of these 

 7 genera therefore that demonstrate, beyond all doubt, the zoological affinity of these 

 islands to the American continent, so far as the class Aves is concerned. 



' Perhaps also California. 



3e2 



