The Dispersal of Seeds by Ants. 83 
corner A. There are, besides, a few isolated bushes of gorse in 
the upper field ABDC, but so few that they in no way lessen the 
♦ <> f S'- 
x 
- I ilex 
Co JULwui^, 
Fig. 1. Plan of some fields near Hurdlow Station in Derbyshire."^Showing 
rectilinear distribution of the gorse (Ulex europaus ) across a heather covered 
field ABDC. (From the six-inch to a mile Ordnance Survey Map. Scale 
1 : 10560). 
