CATALOGUE. 
601 
full incli ; it is also broad behind, becoming gradually narrower, to 
the front ; whereas that of B. plicatus is much more uniform in its 
breadth throughout. Female with the head and neck also black, 
and smaller in size. 
" In a series of specimens before me, the curious fact of the suc- 
cessive advance forward of the ridges of the casque, in consequence 
of the growth from behind, is particularly manifest. In none of 
these specimens does the number of transverse ridges exceed seven, 
and it is obviously apparent, upon inspection of the series of speci- 
mens, that these ridges are thus pushed forward till they finally scale 
off anteriorly, while others are continually in process of formation 
behind ; also that in young birds they are individually much larger 
and thinner in substance, becoming narrower and closer by degrees." 
" Inhabits Arracan and the Tenasserim provinces ; in the latter, 
the Bev. J. Barbe states that both this species and B. pUcatus are 
very common, associating in flocks of a dozen or twenty birds, but 
the two species do not mingle in the same flock." — (Blyth.) 
Genus AcEROS, Hodgson, Gray's Zool. Misc. p. 85 (1844). 
884. ACEROS NIPALENSIS, Hodgson. 
Buceros nipalensis, Hodgson, Calcutta Gleanmgs in Sci. 
I. p. 249 (1829) ; Asiatic Bes. XVIII. ^j^. 1,^.176, 
^. $ ; P. Z. S. (1832), p. 15 ; Cat. B. of Nepal, 
p. 112. Bhjth, J. A. S. Beng. XI. p. 970 ; XII. 
p. 989 ; XVI. p. 997 ; Gat. B. Mus. A. S. Beng. 
p. 45. G. B. Gray, Gen. of B. II. p. 400, t. 99, 
Aceros nipalensis, Hodgson, Gray's Zool, Misc. (1844), 
p. 85. 
Calao nipalensis, Bonap., C. G. Av. p. 90. 
A. B. (J ? . Darjeeling. From Pearson's Collection. 
c. d. e. Sy ? J and young ^ . Nepal. Presented by B. H. 
Hodgson, Esq. 
" Inhabits the S. E. Himalaya, also the hill-ranges of Assam and 
Munipur."— (Blyth.) 
" Tenants the deep woods, covering the hills which overhang the 
great saul-forest. Its more peculiar haunts are the largest trees, 
especially such as are decaying, the trunks of which it perforates from 
the side, making its abode within upon the solid wood, and having 
its mansion further secreted by an ingeniously-contrived door, so 
that it is difiicultly found, and more diflicultly taken. I am told it 
