R. H. Thomas 



295 



Finding that two distinct patterns of the Silver hen exist in the 

 aviaries of this country I sent a breast feather of each to the Natural 

 History Museum, South Kensington, and I append to this paper a table, 

 kindly made at my request by Mr Ogilvie Grant, of the patterns of the 

 wild G. nycthemerus from the specimens at the Natural History Museum, 

 which shows these birds to be in a mutating or extremely varying 



Notes from British Museum, Natural History, 

 Ornithological Department. 



Gennaeus nycther)ierus. 



Fig. 1. 



Fig. 2. 



Breast feathers of the two types B (1) and Z (2) of the female Gennaeus mjcthemenis. 



80—2 



