Recently published Ornithological Works. 603 



stance with organic pigments. A solution-spectrum has two 

 absorption-bands, nearly coinciding in position with those of 

 oxyhsemoglobin, from which, however, Turacin differs greatly 

 in chemical composition, containing, as is well known, copper 

 in abundance. Zoonerythrin gives a continuous spectrum, 

 Zoofuloin one with two absorption-bands, which, however, 

 are not those of Turacin. Attempts to extract blue, violet, 

 and green pigments from feathers so coloured have as yet been 

 unsuccessful ; and these colours may therefore depend upon 

 optical, and not chemical, causes. 



97. Ridgway on an American Duck. 



[On a Duck new to the North American Fauna. By Robert Ridgway. 

 Proc. U.S. Nat. Mus. 1881, p. 22.] 



The Duck in question is Fuligula rufina, of which an ex- 

 ample was obtained in Fulton Market, New York, in February 

 1862, '' supposed to have been shot on Long Island Sound.^^ 

 It was at that time believed to be a hybrid, but on further ex- 

 amination turns out to be an immature male oi Fuligula rufina. 



98. Ridgway on Amazilia yucatanensis. 



[On Amazilia yzicatanensis (Cabot) and A. cerviniventris, Gould. By 

 Robert Ridgway. Proc. U.S. Nat. Mus. 1881, p. 25.] 



In this Journal (1879, p. 208) we ventured to dissent 

 from Mr. Elliotts view of referring Amazilia yucatanensis 

 (Cabot) to A. cerviniventris , and suggested a reexamination 

 of the question. This Mr. Ridgway has now undertaken by 

 comparing Cabot^s type with Texan specimens of A. cervini- 

 ventris. The result arrived at is that the species are distinct ; 

 and comparative diagnoses are given. 



99. St. John's ' Wild Coasts of Nipon.' 



[Notes and Sketches from the Wild Coasts of Nipon, with chapters on 

 cruising after pirates in Chinese waters. By Captain H. C. St. John, 

 R.N. 8vo. Edinburgh, 1880.] 



Captain St. John^s account of his sporting and collecting 

 adventures on the Japanese coasts will be read with great 



