10 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XI. 



Sub-Order ANSERES. 

 Family Anatida^;. 

 Key to the Sub-Families — 

 a Hind toe not lobed. 



d Neck as long or longer than the body ... 1 Sygninje. 

 V Neck not as long as body. 



a" Hind toe rather long, tail-feathers 



rather long. Upper part glossy ... 2 PlectroptobiNjE. 

 b" Hind toe moderate, tail-feathers rather 

 short. Upper parts not glossy. Mocere. 3 Anserine. 

 b Hind toe very narrowly lobed, 



c' Bill short and goose-like 4 Chenonettin^:. 



d" Bill rather flat and broad ... ... 5 Anatiiwe. 



c Hind toe broadly lobed, 

 e" Bill more or less depressed. 



c" Tail-feathers normal... ... ... 6 Puligulisle. 



d" Tail-feathers narrow and very stiff... 7 Erismaturin^. 

 /' Bill more or less compressed, never 



decidedly depressed .„ ... ... 8 Merging. 



Sub-Family Cygnin^. 



This sub-family contains but one genus which is represented in 

 India, the other two families Chenopsis and Pescoroba being con- 

 fined to Australia and South America only. 



The swans are so easily identified by the veriest beginner that it is 

 not necessary to add anything to the above key, though there are a good 

 many other distinctions they possess, besides the one named, interest- 

 ing only from a scientific point of view. 

 Key to the Species — 



a No knob at the base of the culmen ; lores yellow, 

 a' Black apical portion of the bill gener- 

 ally does not extend above the nostrils, 

 and on the side only reaches half-way 

 to the gape. Culmen exceeds 4" ... 1 C. MUSICUS. 

 V Black apical portion of the bill extends 

 much above the nostrils and back- 

 wards to the gape. Culmen under 4"... 2 C. bewicki. 

 b Culmen with a prominent knob at the base ; 



lores black ,.. ,.. .„ .,« o C, olor. 



