A second and larger species is the brindled gnu or blue wildebeest (C. taurinus or Catoblepas gorgon), also known by the Bechuana name kokon or kokoon; and there are several East African forms more or less closely related to the latter which have received distinct names.
With the establishment of a British protectorate at Zanzibar, and of British and German protectorates on the mainland of East Africa and in the region of the head-waters of the Nile, the East African slave trade received its death-blow.
An army of over io,000 men was raised for service in the East African campaign.
The surrounding region has been overrun by Arabs and Swahili from the East African coast.
When at the beginning of the 16th century the Portuguese obtained possession of the towns along the East African coast, they had been, for periods extending in some cases fully five hundred years, under Arab dominion.
