LINN.EUS. 281 



57. Ciiculus, cuckoo. Beak roundish ; nostrils with a 

 prominent margin : 22 species. 



58. Yunx, wryneck. Beak roundish, sharp pointed ; 

 nostrils concave : 1 species. 



59. Picus, woodpecker. Beak angular, straight, the 

 tip wedgeshaped; the nostrils covered with recumbent 

 bristly feathers : 21 species. 



60. Sitta, nuthatch. Beak awlshaped, roundish, 

 straight : 3 species. 



61. Todus, tody. Beak awlshaped, a little flattened, 

 obtuse, straight, with spreading bristles at the base : 2 

 species. 



62. Alcedo, kingsfisher. Beak three cornered, thick, 

 straight, long: 15 species. 



63. Merops, bee-eater. Beak curved, compressed, 

 keeled : 7 species. 



64. Upupa, hoopoe. Beak arcuate, convex, a little 

 compressed, rather obtuse : 3 species. 



65. Certhia, creeper. Beak arcuate, slender, acute : 

 25 species. 



66. Trochilus, humming-bird. Beak slender, longer 

 than the head, its tip tubular : 22 species. 



Order III. Anseres. 



67. Anas, swans, geese, and ducks. Beak lamellated 

 at the margin, convex, obtuse : 45 species. 



68. Mergus, merganser. Beak denticulate, cyhndri- 

 cal, the tip hooked : 6 species. 



69. Alca, auk. Beak short, compressed, convex, fur- 

 rowed ; the lower mandible with a prominent angle ; 5 

 species. 



70. Procellaria, petrel. Beak a httle compressed ; the 

 upper mandible hooked, the lower channelled and com- 

 pressed at the tip : 6 species. 



71. Diomedea, albatross. Beak straight; upper man- 

 dible hooked at the tip, lower abrupt : 2 species. 



