(Fig. 29.) (Fig. 30.) 
ORDINARY LONG-EARED SHEEP AND SHORT-EARED VARIATION 
The ramat the left (4 3L) has ears of the usual length. The ewe at the right (9 127) shows a short- 
eared type which appeared as a mutation. This variation has behaved as an imperfectly domi- 
nant unit character since its appearance. The homozygous form is illustrated by the wholly ear- 
less sheep shown below. 
EARLESS SHEEP, FRONT AND SIDE VIEWS 
This ram (4 698), which wholly lacks external ears, was produced by mating two of the short- 
eared sheep at the N. H. Experiment Station. It is believed that the absence of ears is due to 
homozygosis in a factor which is responsible for the short-eared type when heterozygous. (Fig. 
