270 EASTERN ETHIOPIA xxi 
inches in the Beisa oryx. In a fight these horns are as 
formidable as bayonets. 
The horns of the reedbuck stand up almost vertically 
from the head, and their tips are turned forwards like a 
hook. The duikers have horns which are dainty and 
straight, though their surfaces are annulated; they 
hardly exceed in thickness the handle of a pen. The 
horns of the gazelles and the cobs assume the shape 
The Skull of a Roan Antelope showing the mode in which the 
horn cores arise from the frontal bone above the orbits. 
(Museum, Royal College of Surgeons, England.) 
of a lyre (lyrate) : wliilst those of the roan antelope 
form a graceful backward curve. 
The horns of the cobs diverge from each other as they 
leave the skull and converge towards the tips : these 
horns are also curved in such a way that the concavity 
is directed forwards and upwards. In the grandest cob, 
the water-buck, the horns often attain a length of thirty 
inches. 
The horns of the roan antelo]3e rise from the frontal 
bones immediately above the orbits and arch back- 
