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CYGNUS. SWAN. 



Generic Character. 



Rostrum basi tuberculo car- 

 neo tumido instructum, 

 supra subcylindricum, la- 

 minato-dentatum, obtu- 

 sum ; mandibula superiore 

 unguiculata et ad apicem 

 incurvam, inferiore planii. 



Nares in medio rostri sitag. 



Collum longissimum. 



Pedes ex equilibrio corporis 

 positae, tetradactyli ; diglti 

 anteriores toti palmati ; 

 pollex simplex. 



CYGXUS. Ray, Briss., Cuv. 

 AX AS. Linu., Gmel., Lath. 



Beak furnished with a tumid 

 fleshy tubercle at its base, 

 above subcylindric lami- 

 nato-dentate, obtuse; the 

 upper mandible hooked 

 and incurved at its tip ; the 

 lower flat. 



Nostrils placed in the middle 

 of the beak. 



Neck very long. 



Legs placed out of the equi- 

 librium of the body ; four- 

 toed ; the anterior toes en- 

 tirely webbed ; the lander 

 toe simple. 



OWAXS are well known from their superior size, 

 being generally the largest birds of this family: their 

 beak is as broad towards the tip as at its base, which 

 is usually higher than broad j the nostrils are placed 

 near the middle of the beak, and the neck is greatly 



