Pp. (4), 1-856; 124 text-figures (black-and-white photographs, line-drawings), other text-figures. Publisher's original dark blue cloth, lettered in gilt on the spine, 8vo. This is Dr. Delson's Ph.D. dissertation on the evolution of Old World monkeys with special emphasis on the fossil colobines of the Mediterranean region of Europe. This 856 page dissertation, in two thick bound volumes, is one of the more detailed and through analyses of fossil Old World monkeys ever published. No ownership marks and no signs of use.