992 Mr. BIytJis Report for December Meeting, 1842. [No. 143. 



would ever have a black tail with white outer feathers, as Shaw 

 mentions to be the case sometimes (this being characteristic of B. 

 Malabaricus, the young of which Cingalese species was probably here 

 confounded with the present one). Stephens annexes, as synonyms 

 of B. plicatus, the B. undulatus, Shaw, and B. Javanicus, Shaw. 

 The latter is described to have the head " pale rufous," whilst in seven 

 male specimens of the present species before me, the head is invariably 

 very dark rufous-bay, or deep maronne : B. undulatus, also from 

 Java, is described to have, " at the lower part of the neck, between the 

 shoulders, a moderately large patch of red-brown, adding a consider- 

 able ornament to the plumage of that part" ; the present bird has 

 nothing of the kind : the female Javanicus is stated to be " some- 

 what smaller, and destitute of the reddish-brown patch between the 

 shoulders." 



This may also, rather than the preceding species, be the Sumatran 

 pucoran of Raffles, which is stated to have a yellow gular skin : that 

 of undulatus, together with the orbits and the space immediately 

 between them and the upper mandible, is described as bluish ; that of 

 Javanicus as yellowish-white. The two species here described are 

 undoubtedly the two allied Tenasserim races mentioned by Mr. Barb 

 (J. A. S., X, 922), as differing only in the colour of the naked skin of 

 the throat and around the eyes, which in one is of a beautiful blue, 

 and in the other an equally rich yellow : it is impossible to form any 

 decided opinion from the dry specimens ; but it would seem from them 

 that the larger or pucoran (apud nos) is the yellow-throated species, 

 and the smaller or plicatus the blue-throated. 



In Griffith's work (VII, 418), B. Javanicus is placed among the 

 species without a casque ; and I have no confidence in the synonyms 

 attached, particularly as the Calao de Waygiou, or B. ruficollis, Vieillot, 

 is included among them. There are evidently several allied species 

 which require further investigation, unless they have been subse- 

 quently elucidated, which is most probable. 



In a series of nine specimens before me of B. plicatus, the curious 

 fact of the successive 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 



