CLASSIFICATION. 



Key to the Species. 



a. Bill very broad, and bowed inwards towards the tip ; 



the lamellae on the side of the upper mandible 

 distinctly visible when the bill is closed . . 



b. Bill narrower, distinctly bowed inwards towards the 



tip ; lamellae much less distinct, and only visible 

 in the closed bill towards the gape. . 



c. Bill still narrower, not bowed inwards towards 



the tip, the sides nearly straight ; lamellae much 

 reduced in size, and not visible when the bill is 



d. Bill shorter, stouter, and much compressed, not bowed 



inwards towards the tip, but with the sides nearly 

 straight ; unguis large, yellowish 



vittatus, p. 285 



banksi, p. 289 



desolatus, p. 293 



brevirostris, p. 297 



FAMILY III.— PELECANOIDID.E. 

 (Salvin, Cat. Birds Brit. Mus., XXV., p. 437.) 



XXII. — Pelecanoides, Lacep. 



Pelecanoides, Lacepede, Mem. l'lnstit., III., p. 513 (1801) ; 

 Coues, Pr. Acad. Nat. Sci. Philad., 1866, p. 188; 

 Forbes, Voy. " Challenger," Zool., IV., pt. XL, 

 p. 42 (1882); Shufeldt, Pr. U.S. Nat. Mus., X., 

 p. 380 (1887); Salvin, Cat. Birds Brit. Mus., 

 XXV, p. 437 (1896) 



Haladroma, Uliger, Prodr., p. 273 (1811) ; Bp., Consp. Av., 

 II., p. 206 (1856) 



Pufflnuria, Lesson, Voy. " Coquille," I., p. 729, PI. 46 (1826) ; 

 id., Traite d'Orn., p. 614 (1831) 



Type 



P. urinatrix 



P. urinatrix 



P. urinatrix 



The Diving Petrels show a remarkable similarity in appearance to the Little Auk of 

 the Northern Hemispheres, and even the habits of the two forms, though separated 

 from each other by the entire Temperate and Equatorial areas of the Globe, are 

 almost similar. 



Key to the Species. 



a. Smaller ; wing, 4.3-5.2 inches. 



a'. Throat, flanks, and under wing-coverts nearly 



pure white ; flanks sometimes ashy . . . . urinatrix, p. 299 



LI 



