— 140 — 



Distiugnishing c/iaracteis. — Schlegel, in the original descrip- 

 tion, distinmiished tliis Hornbill tVoin L. ciuiiiirus because in liis 

 opinion tlie end ot tlie bill was black as against the rcd bill of 

 ciiffiurus. This character does not hold good but Mr. W. L. Sci.a- 

 TER, in Bi///. B. (). (\, XLII, p. 45, shows that the Upper-Guinea 

 birds hâve darker iipper-parts, especially the crown of the head 

 which is darker than the back. 



(A very difficult bird to find, living as it does in dense swampy 

 forest-countrv. Thev are found in small flocks of about six birds. 

 - \V. P. L.) 



Tropicranus ') albocristatus cassini. 



OrÛiolophiis cassini FiNSCH, Notes Leyden Mus., XXIII, u>03, 

 p. 201. — Tvpe localitv : Gaboon. 



Cassin's Wliite crested Hornbill was obtained bv Mr. Lowk at 

 Iju. I was inuch interested to find that the séries secured ail belon- 

 ged to this form and not to the Gold Coast race. There has been 

 a great deal of confusion over this Hornbill, which Dr Finsch 

 cleared up in Notes Leyden Mus., XXIII, 1903, pp. 195-205. 

 Further correspondence on the subject took place hetween 

 Dr. Finsch and Dr. Bowdler Sharpe in Ihis, 1904, p, 610 and 

 1905, p. 286 which should be consulted if any doubt reniains as to 

 whether T. cassini is valid. 



I propose hère to foUow Dr. Finsch in his review of the species 

 and recognise three races. The e.xtension of the range T. a. cassini 

 is of interest. 



i . — Tropicranus albocristatus albocristatus. 



Buceros albocristatus Cassin, Froc. Ac. Phil., III, 1848. — Type 

 localitv : St. Paul s river, Libéria. 



Range. — Libéria and Sierra Leone. 



(") For reasons why Oriholophus can no longer be used for this ijenus seeSci.XïER, 

 Mull. B. O. C, XLII, 1922, p. 76. ' ' 



