374 GALLO-GRALL.t:. 



Family OPISTHOCOMID^ *. 



[Cf. fSeebohm, Classif. B. p. 40.] 



A. Palate schizoonathou^. 



13, Nasals holorhinal. 



( *. Dorsal vertebra? lieterocoelous. 



D. Episternal process not ])erfbrated to receive the sternal ends 



of the coracoids. 



E. Posterior processes of" the ilia sufficiently separated to show a 



broad sacrum. 



F. Hallux large. 



G. Oil-gland tufted. 



Genus OPISTHOCOMUS. 



Uliger, Prodromus, p. 239 (1811). 



Opisthocomus cristatus. 



Phusianus cristatus, Gmeliii, Syst. J^at. ii. p. 741 (1788). 

 Opisthocomus cristatus (Gm.), Sclater & Salvin, Nomencl. Av. 

 N"eotrop. p. 139 (1873). 



The Hoatzin. 



Ilab. Guiana and Amazonia. 



1877. Skeleton (very much injured), 0, C. 1403 b. 



Presented by P. L. Sclater, Esq., F.R.S. 



1878. Articulated skeleton. From Surinam. 0. C. 1405 a. 



Presented by P. L. Sclater, Esq., F.R.S. 



1879. vSternum of spec. 1403b, with shoulder-girdle. S. S, 2()01. 



Presented by P. L. Sclater, Esq., F.R.S. 



1880. Eight manus of spec, 1403 b. S. S. 2603, 



1881. Pelvis of spec. 1403 b. S. S. 2602. 



Presented by P. L. Sclater, Esq., F.R.S. 



1882. Right i)es of spec. 1403 b. S. S, 2604. 



Presented by P. L. Sclater, Esq., F.R.S. 



* = Hiteronwrpha. Huxlt'V. I'. Z. S. 1868, p. oOo ; = Suborder Opi^^thi- 

 romiformcs, Shar])o, IJL'\iew, p. 70. 



