252 On a Collection of Birds from the Marquesas Islands. 



10. Gygis microrhyncha, Saunders. 



There is also one specimen of this scarce and peculiar 

 species. On taking the two birds out of the spirit^ I was 

 struck by the contrast in the shape of the bill, and especially 

 by that of G. Candida being very much more expanded at 

 the base. This does not appear in the dried specimens. 

 The bill of G. microrhyncha, on the contrary, is compressed 

 at the base, and terminates sharply and abruptly. The 

 quills of the larger species are very distinctly black, while 

 those of the other are pure white before being dried. 



4-11. Sterna fuliginosa, Gm. 



Two specimens, nestlings, in different stages of plumage, 

 the first not having lost the down, with the curious black and 

 white barrings all across the plumage, both above and below. 

 The second is more advanced, with the same chequering or 

 barring still retained on the whole plumage. 



12. Angus stolidus, L. 



One specimen, not fully adult, and with traces of the nest- 

 ling-plumage still remaining. 



13. Angus c^eruleus, Bennett. 



Two adult specimens of this rare and beautiful miniature 

 Tern, of a uniform sooty black, rather lighter on the head. 

 It is a mere pygmy, even when compared with our least Tern, 

 and one third less in size than the Anous cinereus, Gould, 

 with which it has sometimes been confounded. 



14. Procellaria macgillivrayi, G. R. Gray. 



A small Petrel, exactly corresponding in all respects to P. 

 bulweri, excepting that the bill is thicker at the base, and 

 that the colour is more uniformly black, without any tendency 

 to sooty brown on the wings. One adult specimen. 



N.B. I have been kindly assisted by Mr. Howard Saunders 

 in the determination of the Terns. 



