VOCAL MUSIC. 
59 
c«. 
Ap - XIII. 
} ' le head-crest and neck-appendage are rudimentary 
11 the female . 44 
ly Ali e vocal organs of various web-footed and wading 
( ' 1 ' lS ai 'e extraordinarily complex, and differ to a certain 
X ' ( ' I1 t in tlie two sexes. In some cases the trachea is 
40 - The Umbrella- Bird or Ceplmlopterus omatns (male, from Brclmi; 
a French horn, and is deeply embedded 
I<; sternum. In the wild swan (Cygnus ferns') it is 
Naturalist on the Amazons,’ 1S63, vol. ii, p. 284 ; 
larg er r,’ m l -* 3ro °- Zool. Soe.’ 1850, p. 206. A new species, witli a still 
‘Ibis > “ e . ok ' a PPendage (C. penduliger), has lately been discovered, see 
’ °‘- 1- p. 457. 
