NATATORES. 



371 



This appears to be the most mature plumage, and is that described 

 by Gmelin and Latham (Gen. Synopsis, III, p. 604), King, as above, 

 and Forster (Desc. An. p. 356), 



Second. Like the preceding in all respects, but without the white 

 spots on the ears. Plumage not so glossy and tinged with brownish 

 on the upper parts. Longitudinal band on the throat more restricted 

 but well defined. 



Third. Entirely black ; abdomen with a few white feathers ; lon- 

 gitudinal band of white on the throat well defined ; no white spots on 

 the ears. Plumage glossy, as described above. Bare space at the base 

 of the mandibles more limited. 



The last appears to be precisely identical specifically with both of 

 the preceding, showing no other different character than that the 

 under parts are black instead of white. In size and measurements of 

 all the parts, these specimens correspond with each other. The black 

 plumage of the under parts here alluded to, we have not seen pre- 

 viously described as applicable to this species, Phalacrocomx inger, 

 King, Zool. Jour. IV, jd- 101, being clearly not this bird, but a much 

 larger species. The present species inhabits the shores of Western 

 and Southern South America, and, according to Dr. Pickering, was 

 abundant at Orange Harbor, Tierra del Fuego. 



Perhaps no birds of the group of swimming birds, have been assigned 

 to a greater number of genera, nor more variously and promiscuously 

 named than the Cormorants. The present species has been regarded 

 as belonging to the genera Pehcanus, Phalacrocorax, Hypohucus, Carho, 

 and Graculus, of authors, and ultimately is rated, by the Prince Bona- 

 parte, as a recruit in his neio genus Urile, Conspectus Avium, II, p. 

 175 (1855). This is the tenor of the latest advices on the subject, 



2. Carbo atriceps [Kiufj). 



Phnlacrocorax atriceps, King, Zool. Jour. IV, p. 102 (1828). 



Carho Bowjainvillii, Lesson, Voy. Thetis and I'Esperance, II, p. 331 (1837)? 



Keich. Vollst. Naturg. Birds, pi. LX, figs. 2309, 2310? 



Several specimens from Tierra del Fuego, in the collection, are of 

 the species described by the authors whom we have cited. We can- 



