Gibbons differ from great apes in being smaller and generally monogamous and in not making nests. The species include the siamang, the lar, and the hoolock. The siamang, which is the largest, is distinguished by having two digits on each side stuck together, hence the species name syndactylus.
... by Magellan
Diego Cao, (died c. 1486), explored the African west coast
Jacques Cartier, (1491-1557), discovered the St. Lawrence River and sailed up it to Montreal; ...