268 
EASTERN ETHIOPIA 
XXI 
The Skull of an Antelope. 
The sheath has been removed from one horn in order to display 
the core and show its connection with the frontal bone. 
(Museum, Royal College of Surgeons, England.) 
The horns of antelopes form two groups : (l) Spiral 
or Corkscrew horns, and (2) Annulated horns. 
(I) Spiral Horns ,—Corkscrew horns vary much in 
