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colouring and shape of the bare skin on the head and neck are quite different from those of any other 

 species known to me. The type at Rotterdam is the only example yet brought to Europe, so far as I 

 am aware, unless my supposition should prove correct that the guineensis of Bocage (nee Schlegel) is 

 the same species. With the slight knowledge yet possessed of the present species, it is impossible 

 to give more than an approximate idea of its habitat. It probably, however, ranges upon the 

 west coast of Africa, between the habitat of B. abyssinicus on the north and that of B. cafer on 

 the south ; but how far it may extend into the interior of the continent I have not at present any 

 means of ascertaining. The type, although it has not been very long in captivity, is very gentle, 

 and is greatly pleased when taken into any person's arms and its head is rubbed. Within the 

 gular pouch, at its lower extremity, a hard round substance can be felt, which is capable of 

 being moved upwards as far as the red skin extends. 



Adult.— Bill black, with an orange- coloured plate on the side of the maxilla near the base, 

 as in B. abyssinicus. Casque, rising from base of maxilla, extends backwards over the eye, and 

 then inclines forwards (nearly straight on top), terminating in a wide opening in front, similar to 

 that in B. abyssinicus, but smaller. Space around the eye, and extending backwards nearly to 

 the occiput, bare of feathers, which, together with that beneath the feathers on the forehead, is 

 orange-red. Bare skin on the sides of the neck and throat dark blue. Gular sac orange-yellow 

 in front, orange-red behind, this latter colour running up for a short distance on the posterior side 

 of the blue skin of the neck. Entire plumage of body lustrous black ; primaries pure white ; 

 irides pearly white. 



Length of bill from the angle of the mouth 6f inches, height of casque f , height of bill 

 without casque 1£, tail llf , tarsus 5 J. 



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