156. lagopus Tibetanus, i.
"Himalayan Journals V2."
J. D. Hooker
The whole genus lagopus is a distinctly Arctic one, and there can be no doubt that the British Grouse belongs to the northern migration, just like the Arctic Hare.
"The History of the European Fauna"
R. F. Scharff
433 lagopus hyperboreus, i.
"The Voyage of the Vega round Asia and Europe, Volume I and Volume II"
A.E. Nordenskieold