I'SEUDOGKYrill. 201 



Genus TOCKUS. 

 Lesson, Traite d'Orn. p. 252 (lb31). 



Tockus fasciatus. 



Buceros fasciatus, Shaw, Gen. Zool. viii. p. 3G (1811). 

 Tod-ns fasciatus, Elliot, Moiiogr. Bucerot. pi. 50 (1878). 



The Black-and-AYhite-tailed Hornbill. 



Ilah. West Africa, from Angola to Gaboon. 



871, 872. Two skulls (imperfect). 0. C. 1510, 1511. 



Com/o Eiicpedltion, 18U'». 



Order II. PSEUDOGUYPHI. 



[CATHAETES, Seebohm, Classif. E. p. 23*.] 



[X.B. I have recently (" Review of recent Classifications of Birds,' 



p. 47) expressed my dissent from the position assigned by Mr. Seebohm 

 to the Condor and the other American Turkey Vultures. They are 

 truly Accipitrine birds, but are doubtless very different from the other 

 Birds of Prey, and merit the separate position first accorded to them by 

 Professor Huxley (P. Z. S. 1867, p. 463, where many diagnostic cha- 

 racters are given). Cf. also Beddard, F. E., " Xotes on the Anatomy 

 of the Condor," P. Z. S. 1890, pp. 142-147.] 



A. Palate desmognathous. 



B. Nostrils perforated ; maxillo-palatines situated far apart, 



and, though the distance is bridged over by an ossified 

 nasal septum, the ossification does not prevent the nostrils 

 being pierced. 

 ( ■. Basipterygoid processes present. 



D. Hallux connected with the flexor perfomns digitorum, and 



elevated above the level of the other toes. 



E. Si)inal feather-tract well defined on neck. 



* Vf. Sliufuldt, liei). U.S. Guul. Surv. xi. ]). 727; id. Auier. Xat. 1881, 

 p. t)06. 



