chap, xviii.] OF CELEBES. 42 7 



But although the Sula islands belong to Celebes, they are 

 so close to Bouru and the southern islands of the Gilolo 

 group, that several purely Moluccan forms have migrated 

 there, which are quite unknown to the island of Celebes 

 itself; the whole thirteen Moluccan species being in this 

 category, thus adding to the productions of Celebes a 

 foreign element which does not really belong to it. In 

 studying the peculiarities of the Celebesian fauna, it will 

 therefore be well to consider only the productions of the 

 main island. 



Tlie number of land birds in the island of Celebes is 

 128, and from these we may, as before, strike out a small 

 number of species which roam over the whole Archipelago 

 (often from India to the Pacific), and which therefore only 

 serve to disguise the peculiarities of individual islands. 

 These are 20 in number, and leave 108 species which 

 we may consider as more especially characteristic of the 

 island. On accurately comparing these with the birds of 

 all the surrounding countries, we find that only nine extend 

 into the islands westward, and nineteen into the islands 

 eastward, while no less than 80 are entirely confined to 

 the Celebesian fauna — a degree of individuality, which, 

 considering the situation of the island, is hardly to be 

 equalled in any other part of the world. If we still more 

 closely examine these 80 species, we shall be struck by 

 the many peculiarities of structure they present, and by 



