188 PROCEEDINGS OF THE ACADEMY OF 



a. The culminicorn widens and descends on eitber side behind the nos- 

 trils to coalesce with the latericorn. 



5. D. Melanophrys Boie. Temm. Frontal feathers with a slight reentrant 

 curve on the culmen. Chord of culmeu 4-25. Width of bill at base 1-00 ; 

 height l-TS. Bill uniform light yellow. 



6. D. GiLLiANA Coues. Frontal feathers with a decided reentrant curve on 

 the culmen (nearly as great as in ezidaji.s.) Chord of culmen 5 00 ; width of 

 bill at base 1-45 ; height 1-75. Bill uniform dark brown. (Essential charac- 

 teristics of culminicorn of melanophrys ; general shape of bill of culminata.) 



b. The culminicorn does not widen and descend to coalesce with the 

 latericorn posterior to the nostrils, but continues narrow to the frontal 

 feathers. 



7. D. CAUTA Gould. Chord of culmen 4V5. Frontal feathers with asligbtly 

 convex outline across the culmen : thence descending in a nearly straight 

 line. Bill gray or bluish brown ; the culmen yellowish ; a narrow belt of black 

 around base of upper mandible; one of orange around base of lower, the lat- 

 ter extending to the angle of the mouth. 



8. D. CULMINATA Gould. {chlororhyncha And. Lawr. nee. Gm.) Base of 

 culminicorn broad and rounded. Frontal feathers with a slightly concave 

 outline across culmen. Chord of culmen 4-50. Bill black; culmen and lower 

 edges of inferior mandibular rami bright yellow. 



9. D. CHLORORHYNCHA Gm. (ucc. Aud. Lawr. chrysostoma Forst. '■'■ profuga 

 Banks ;" ^'^ presaga Brandt.'') Buse of culminicorn tapering to an acute angle. 

 Frontal feathers straight or with slight convexity across culmen : thence 

 downwards with some forward obliquity, and slight convexity of outline, 

 forming a sharp reentrant angle at upper corner of base of latericorn. Chord 

 of culmen 4-50. Bill black. Culmen, and a narrow perpendicular line along 

 the sides of the base of the under mandible, bright yellow. 



10. D. OLiVACEiROSTRis Gould. Bill slender, uniform olive green, three and 

 three-eighths long from gape to tip. 



Genus II. Phcebetria Keich. Bill excessively compressed. A sulcus on 

 sides of lower mandible. Feathers forming a deep reentrant angle on cul- 

 men ; an acute salient on one side of lower mandible. Nostrils very 

 narrow. Tail elongated, cuneate. 



11. P. FCLiGiNOSA Reich, ex Diomedea fuliginosa Gm. (aniarctica Banks ; pal- 

 pebrata Forst.; fusca Aud.) Height of bill at base 150, width -75. The cul- 

 men is carinated for its basal half. 



Sub-family HALODROMINJE. 



Some general remarks upon the fundamental characters of this interesting 

 group have already been given at the head of the i)resent article. We may 

 at once proceed to the consideration of the single genus by which it is repre- 

 sented. 



Genus PELECANOIDES Lacep. 



I'rocellaria sp. Gmelin et auct. aliq. 



J'eleca7ioides, Lac6pede, Mem. de I'lnst. 1800-1, p. 517. Typus Proc. urinatrix Gm. 

 Ilaladrorna, lUiger, Prodromus, 1811, p. 273. Typus idem. 

 Onocralus, Rafinesque, 1815 ; fide Bon. 



J'uffmuria, Lesson, Man. 1828, ii, p. 392 : Id. Traite Ornith. 1831, p. 614. Ty- 

 pus P. Garnoii Less. 

 Concerning these numerous names which have been proposed for this genus 



[May, 



