Horse outward similarity is an unreliable measure of relatedness. Besides the horse, there are six other species of genus "Equus" in the Equidae family. These are the ass or donkey, "Equus asinus"; the mountain zebra, "Equus zebra"; plains zebra, "Equus quagga"; Grévy's zebra, "Equus grevyi"; the kiang, "Equus kiang"; and the onager, "Equus hemionus". Horses can crossbreed with other members of their genus. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, a hinny, is a cross between a stallion and a jenny (female donkey). Other hybrids include the zorse,
George Africanus end of which a new memorial stone was dedicated by religious leaders. The Bishop of Kingston (Jamaica), the Rt Revd Robert Thompson, Preached at the service. In the same month, an exhibition was held at Nottingham Council House celebrating the life of Africanus, displaying documents and illustrations connected with his life in Wolverhampton and Nottingham. George Africanus George John Scipio Africanus (c. 1763 – 19 May 1834) was a West African former slave who became a successful entrepreneur in Nottingham. The early life of George Africanus is obscure. Calculating his birth year from his burial certificate, he was probably born