LINN^US. 281 



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

 prominent margin : 22 species. 



58. Yuna^, wryneck. Beak roundish j, sharp pointed ; 

 nostrils concave : 1 species. 



59. Fie us, woodpecker. Beak angular, straight, the 

 tip wedgeshaped; the nostrils covered with recumbent 

 bristly feathers : 21 species. 



00. Sitta, nuthatch. Beak awlshaped, roundish, 

 straight : 3 species. 



01. Todus, tody. Beak awlshaped, a httle flattened, 

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

 species. 



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

 straight, long : 15 species. 



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

 keeled : 7 species. 



04. Upupa, hoopoe. Beak arcuate, convex, a httle 

 compressed, rather obtuse : 3 species. 



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

 25 species. 



G6. Trochilus, humming-bird. Beak slender, longer 

 than the head, its tip tubular : 22 species. 



Ordeo' III. Anseres. 



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

 at the margin, convex, obtuse : 45 species. 



08. Mergus, merganser. Beak denticulate, cylindri- 

 cal, the tip hooked : species. 



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

 rowed ; the lower mandible with a prominent angle : 5 

 species. 



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

 upper mandible hooked, the lower channelled and com- 

 pressed at the tip : species. 



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

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



