xema

[Etym. not apparent.] Ornithology: A genus of Larine, with one species, Xema sabin i , Sabine's Gull, from the north temper ate zone. Bill rather shorter than head, moderately stout, upper mandible decurved from beyond the nostrils to the tip, gonys angulated and advancing upward; nostrils basal, lateral, linear; legs moder. ately long, lower part of tibie bare for some distance; tarsi tolerably strong; three toes in front entirely palmated; hind tee small, elevated wings long; tail distinctly forked. IMG:content-1071.jpg:[blocks in formation]