BIRDS 



143 



its note. I was inclined for a time to suppose that the 

 appendage was connected with the production of the voice, 

 being erected by distension with air, and acting as a resonator. 

 Another species, however, the C. nudicollis of Brazil, whose 



Fig. 15. The Bell-bird of Costa Rica, Chasmorhynchus triearunculatus, male on the right, 

 female on the left. From specimens in the Brit. Mus. Nat. Hist., and published 

 figures. 



voice has been heard at the Zoological Gardens, utters a 

 similar loud bell-like note, and is entirely destitute of the 

 appendage on the bill. 



There is another species found in Costa Rica, C. triearun- 

 culatus, which instead of one has three elongated appendages, 



