892 APPENDIX. 
al 
COUES KEY, 1884. UNION LIST, 1886. 
771 bis. Add: Larus marinus schistisagus. SLaTy-BackED GuLL. Adult: white; 
mantle dark slate-gray. First primary with a long white tip and a gray wedge on the inner 
web; second with a subapical white spot on the inner web only, and the gray wedge further 
down; third with the gray wedge reaching the subapical spot; no gray wedge on outer webs 
of first four primaries. Feet pinkish flesh-color. Bill yellow, with red spot on gonys. Iris 
yellowish cream-color. Nearly the size of the last, from which probably not distinct. N. 
Pacific and Arctic Oceans, coast of Alaska. Bull. U. S. Nat. Mus., No. 29, 1885, p. 67. 
772. Larus argentatus. 51. Larus argentatus. 
773. argentatus smithsonianus. 5la. argentatus smithsonianu 
(74. occidentalis. 49. occidentalis. 
775. cachinnans. 52. cachinnans. 
776. affinis. [50. affinis. 
Tid? californicus. 53. californicus. 
778. delawarensis. 54. delawarensis. 
779. canus. [ 56. | canus. 
780. brachyrhynchus. 55. brachyrhynchus. 
781. heermanni. 57. heermanni. 
782. Rissa tridactyla. 40. Rissa tridactyla. 
783. tridactyla kotzebuil. 40a. tridactyla pollicaris. 
784. brevirostris. 41. brevirostis. 
785. Pagophila eburnea. 39. Gavia alba. 
786. Chroicocephalus atricilla. 58. Larus atricilla. 
T8t. franklini. 59. franklini. 
788. philadelphia. 60. philadelphia. 
789. Rhodostethia rosea. 61. Rhodostethia rosea. 
790. Xema sabinii. 62. Nema sabinii. 
7OL. furcata. +4. furcata. 
792. Sterna anglica. 63. Gelochelidon nilotica. 
793. caspia. 64. Sterna tschegrava. 
794. maxima. 65. maxima. 
790. elegans. 66. elegans. 
796. cantiaca. 67. sandvicensis acuflavida. 
797. hirundo. 70. hirundo. 
798. forsteri. 69. forsteri. 
799. macrura. (8 paradisea. 
800. dougalli. Len dougalli. 
801. superciliaris antillarum. 74, antillarum. 
802. trudeaui. [68.] trudeaui. 
803. aleutica 73 aleutica. 
804. fuliginosa. 75. fuliginosa. 
805. anzesthetica. [76. | anethetus. 
806. Hydrochelidon lariformis. 77. Hydrochelidon nigra surinamensis. 
807. leucoptera. ris. leucoptera. 
808. Anous stolidus. 79. Anous stolidus. 
809. Rhynchops nigra. 80. Rynchops nigra. 
00. [Not admitted in the List. ] 
809 bis. Add: Diomedea exulans. WANDERING ALBATROSS. Adult: White, more 
or less tinged with yellowish, the flight-feathers dusky, the larger wing-coverts and the back 
usually barred with blackish. Bill very stout, with deeply concave culmen, and angulated 
