174 DIRDS OF THE 



Maliakkam. — Iris whitish yellow, in the aestling gray ; 

 bill pea-green, tip rosy, feet greenish gray. In the spe- 

 cimen from the Mahakkam the iris is said to be red. 



Hab. From Tenasserim through the Malay Peninsula 

 to Sumatra and Borneo. 



57. Anthracoceros convexus. 



Buceros cnnvexus Teram. PI. Col. II, p. 82, pi. 530 ($) (1832). 

 Hydrocissa convexa Salvad. Ucc. Born. p. 80. 



Anthracoceros convexus Everett, L. B. Born. p. 162; Sharpe, Ibis 

 1890, p. 15. 



Two males and a female from the Sibau River. — Iris 

 red in the male, brown in the female, naked space round 

 the eye in both sexes white, bill in the male entirely 

 white, casque very large, white, black at the base like 

 the base of the lower mandible, a broad black band along 

 the lower frontal edge of the casque. In the female the 

 casque is much smaller, with vertical frontal edge, which 

 is black, as also the fore-part of the upper and lower man- 

 dible, which latter bears a red patch in front of the black 

 basal part; feet in male and female bluish gray. In a half- 

 grown specimen the iris is gray, the naked parts of face 

 rosy white, bill pale yellowish green, feet bluish gray. 



Hab. Malay Peninsula, Nias, Sumatra, Java and Borneo. 



58. Anthracoceros malayanus. 



Buceros malayanus RafB. Trans. Linn. Soc. XIII, p. 292 (1822). 



Hydrocissa malayana Salvad. Ucc. Born. p. 83. 



Anthracoceros malayanus Everett, L. B. Born. p. 162; Sharpe, Ibis 



1890, p. 16. 

 Hydrocissa nigriroslris ($) Salvad. Ucc. Born. p. 84; Vorderman, 



Natuurk. Tijdschr. Ned. Ind. LI, p. 218 (1891). 



An adult male (N° 293) from Roema 'Mauoeal with 

 white, very strongly developed bill and casque, and with 

 strongly developed pure white superciliary stripe ; further 

 a second adult male (N° 1210) from Nanga Raoen, and 

 another N° 134 (Dr. Nieuwenhuis) from Long Bloe (Upper- 

 Mahakkam) with bill and casque white but with ashy gray 



Notes from the Leyden IMuseum, "Vol. XXI. 



