The first of the series (which appears to have no predecessor) single-lobed; the other four composed of two lobes, each subtriangular in section.
Specimens in the museum at Tervueren near Brussels show that in fully adult males the horns are subtriangular and inclined somewhat backwards; each being capped with a small polished epiphysis, which projects through the skin investing the rest of the horn.
The two lateral lobes are subtriangular in form.
How would you define subtriangular? Add your definition here.