STEATOUNITHID^. 



191 



B. Basipterygoid processes present. 



C. Dorsal vertebroe opistlioeoelous. 



D. Sternum with two notches on the jiosterior maroin. 



«r" 



Ventral aspect of cranium of Steatornix c<iriepc>ms (enlarged). 

 Letters as before. 



E. Hallux present and connected with the flexor pe)fora)is cllgi- 



torum. 



F. Spinal feather-tract well ilefined on the neck, l)nt forked on 



the upj)er hack. 



Genus STEATORNIS. 



Humholclt, Bull. Soc. Philomatique, Paris, 1817, p. 51 ; 

 Garrod. P. Z. S. 1873, p. 526. 



Steatornis cariepensis. 



Steatornis cariepensis, Humboldt, Eull. Soc. Philom. 1817, p. 51 ; 

 Sclater & Salvia, jSTomencl. Av. p. 97 (1873). 



The Oil-bird. 



Hah. Colombia, Venezuela, and Tiinidad, to Peru. 



819. Skull. 0. C. 1528 D. 



Presenfed h,j P. L. Sclater, Esq., F.R.S. 



