Hyatt.] 242 [May 17, 



the blue grey of the back of the neck and the partial collar formed 

 by the extension of this color below the lateral orange bands, are all 

 peculiar to the two species representing this genus. The bill is ex- 

 tremely long and shallow, but very wide proportionally at the base, 

 and flattened. The tip is acute and bent in both mandibles. Broad 

 orange colored spaces occupy either side of the mandible for two- 

 thirds of its length, tapering to a point at either extremity. 



Nostrils naked and, in the specimen examined, buried in the nasal 

 groove, which is very deep and distinct. 



The maxilla is covered with feathers somewhat more than half its 

 entire length. Tail feathers long. Size largest in the family. 



Spheniscus. 



The coloration is uniformly dark, strongly contrasting with Apten- 

 odytes in this respect. There is, however, a constant tendency to 

 form a collar around the throat as in Spheniscus magellanicus, and 

 to leave the sides of the head lighter colored. The bill is straight, 

 short, laterally compressed, narrow and deep, the maxilla distinctly 

 hooked, the mandible truncated. The feathers extend only a short 

 distance on the maxilla; the nostrils are exposed and naked, the 

 nasal groove being very shallow. In S. demersus and its immediate 

 congeners the maxilla has also several sulci towards the base. 



The mandible is feathered to the angle of the lower and upper 

 corneous plates of the jaw — about cne-half of its length. Tail 

 feathers very short. 



Pygoscelis. 



The coloration is uniformly dark, and there is a general tendency 

 to form incomplete hoods of color. Thus, in P. papua, the hood is 

 broken by a white semi-lune on top ; in P. antarctica by white cheeks, 

 the lower border of the hood, however, still remaining as a dark line 

 encircling the throat just below the base of the bill; in P. adelics, 

 when adult, the hood is complete, but the white cheeks of P. antarc- 

 tica are represented by a semi-circle of white continued upward from 

 the neck towards the eyes on either side. 



The bill is straight, not so long and flattened as in Aptenodytes 

 Pennantii, but looking quite like the bill of that species. Of course 

 it is destitute of the colored patches on the sides of the mandible, 

 the apex of which is truncated with an ascending gonys, instead of 

 being acute and decurved as in Aptenodytes. 



