DELAGE, YVES (1854-192o), French zoologist, was born on May 13, 1854, at Avignon. He became zoology professor at the Sorbonne in 1886. In 19o1 he was made director of the laboratory of marine biology at Roscoff, Finistere. Delage was one of the first authorities on animal reproduction, hybridism and hereditary (see REPRODUCTION ; HYBRIDISM ; PROTOPLASM). He died in Paris on Oct. 8, 192o.
See L'Heredite et les grands problemes de la biologie generale (189s ; 2nd. ed., 19o3) ; La Structure du protoplasma (189s) ; Traite de zoologie concrete (6 vols., 1896-1902) ; Les Theories de l'Evolution (19o9, Eng. trans. 1912) ; La Parthenogenese naturelle et experimentale (1913) ; with M. Goldsmith, Le Reve, etude psychologique, philoso phique et litteraire (1919).