The Hyracoides are represented by three genera Procavia, Dendrohyrax and Heterohyrax. These enjoy a wide distribution throughout Africa and the Middle East while the dassie or rock hyrax, Procavia capensis, occurs in particularly large numbers in Southern Africa. The vascular system of Hyracoldea shows differences within the species as well as differences from other mammals. Keywords: Calcium excretion, Dassie, Enzymes, Gastro-intestinal tract, Hot arid environments, Iliolumbar, Intraabdominally testes, Medial sacral artery, Pudic-epigastric, Scrotum, Spermatogenesis, Superior suprarenal artery and Vascular anatomy.