Recent Ornithological Publications. 393 



not obtain, specimens of the Noddy of the Pacific coast, which 

 Dr. Coues now separates under the name of A. frater. — 0, S. 



16. Angus tenuirostris, Temm. 



The specimens are identical with examples labelled " A. tenui- 

 rostris, Temm./' in the museum of the Philadelphian Academy; 

 and, so far as I can judge, this identification of them is correct. 

 Setting aside the common A. stolidus and my A. frater, its Pacific 

 representative, and some species, e. g. A. jJarvulus, Gould {A. 

 cinereus, Treboux), which have been improperly referred to the 

 genus Anoiis, the remaining valid species are A, melanops, Gould, 

 A. leucocapillus, Gould, and A. tenuirostris, Temminck, all three 

 very closely allied to each other. I believe they may be briefly 

 distinguished thus : — A. melanops has white under-eyelids, and 

 the very dark circumocular region rendered still more conspi- 

 cuous by the ashy hue of the lores. A. leucocapillus has no white 

 on the under eyelid; and the lores are of one colour with the 

 dark circumocular region. A. tenuirostris, like A. leucocapillus, 

 has the lores very dark coloured ; but it has white under-eyelids. 

 It is also notably smaller. 



a. Adult 2 , "Glover's Reef," British Honduras, May 12, 1863. 



The collection thus embraces fifteen or sixteen species of 

 eight genera of two subfamilies of Laridm. 



XXXIII. — Recent Ornithological Publications. 



1. English Publications. 



The 'Edinburgh New Philosophical Journal' for October 1863 

 contains " Some Observations on the Eggs of Birds," from the 

 pen of Dr. John Davy. These chiefly relate to the nature and 

 properties of the colouring-matter, and to the results of certain 

 experiments on the albumen. With regard to the former sub- 

 ject. Dr. Davy appears, generally, to have come to the same 

 conclusion as Professor Wilke (' Naumaunia,' 1858, p. 393) and 

 M. Leconte (Rev. et Mag. de Zoologie, 1860, p. 199) have done, 

 namely, that the colouring- matter *' is not in any way owing 

 to the presence of iron," and consequently is not derived from 

 the blood — an opinion contrary to that maintained, we believe, 

 by M. 0. DesMurs in his celebrated ' Oologie Ornithologique.' 



VOL. VI. 2 D 



