186 
WILD NORWAY. 
of this group more clear, they may be put in tabular 
form, thus :•— 
True Grouse. Habitat (in North Europe). 
1. Lagopus Scoticus —"Red grouse—British Islands only. 
2. „ subalpinci —Willow-grouse—Scandinavia only. 
3. „ hemileucurus —Arctic willow -1 Spitsbergen and the 
grouse f higher Arctic region. 
True Ptarmigan. 
1. Lagopus mutus —Ptarmigan—Both Scotland and Scandinavia. 
2. „ rupestris —Rock-ptarmigan—Iceland and the lower 
Arctic region. 
Another important point in this connection is the 
relative size of the two forms. Ptarmigan, generally 
speaking, are distinctly smaller than grouse; yet two 
adult Spitsbergen ryper, shot by me in Ice-fjord on 
July 26th, weighed 30 ozs. each, while three shot by 
Mr. Arnold Pike, on Danes Island, in October (79° 55" 
N. lat.), scaled exactly one kilo, or 2 lbs. 3| ozs. apiece 
—that is, far heavier than the biggest red grouse on 
record. 
It will thus be seen that, though the ptarmigan 
affects greater altitudes, the grouse is really the stronger 
and hardier bird, and survives at far higher latitudes. 
