606 R. W. SHUFELDT 



Gkant, Ogilvie 1893 (Opisthocomidae.) Cat. Birds, vol. 22. 

 L'Herminier 1837 Anat. of the hoatzin. Comptes Rendus, 5. 

 Huxley, Thos. H. 1868 On the classification and distribution of the Alec- 



toromorphae and Heteromorphae. P. Z. S. 

 Mitchell, P. Chalmers 1896 A contribution to the anatomy of the hoatzin 



(Opisthocomus cristatus). P. Z. S. 

 MtJLLER, Johannes 1841 On the hoatzin. Ber. Akad. Wissensch. Berlin. 

 Newton, Alfred 1893 A dictionary of birds. Assisted by Hans Gadow, 



with contributions from Richard Lydekker, Charles S. Ray, and Robert 



W. Shufeldt. Part 2. Hoaetzin, or Hoatzin. 

 Parker, W. K. 1891 On the morphology of a reptilian bird, Opisthocomus 



cristatus. Tr. Z. S. 

 Perrin, J. B. 1868 Observations on the hoatzin. 



1868 Digestive system of the hoatzin. Tr. Zool. Soc. 



1873 On the myology of Opisthocomus cristatus. Tr. Zool. Soc, 



also P. Z. S. 

 Pycraft, W. p. 1895 On the pterylography of the hoatzin, Opisthocomus 



cristatus. Ibis, ser. 7, vol. 1. 

 Quelch 1890 On the habits of the hoatzin, Opisthocomus cristatus. Ibis, 



ser. 6, vol. 2. 

 Sharpe, R. B. 1891 Classification of birds. Budapest. 

 Shufeldt, R. W. 1904 An arrangement of the families and the higher groups 



of birds. Amer. Nat., vol. 38. (Skeleton of the hoatzin.) 

 Sounini de Manoncour, C. N. S. 1785 Du Sasa [Opisthocomus cristatus]. 



Oiseau de la Guyane. Jour, de Physique, 27. Also Uber den Sasa 



eines Vogel aus Guiana. 1786, Licht u. Voight's Magaz., 3d ser., 4. 

 Sundevall, C. J. 1873 Methodi naturalis avium disponendarum tentamen. 



Stockholm. 

 Young, C. G. 1888 Opisthocomus cristatus, its habits, nesting, anatomy, and 



wing-formation. Notes Leyd. Mus., 10, pi. 8. 



