Affo; Welsh epa; Old Bohemian op; a word of uncertain origin, possibly an imitation of the animal's chatter), the generic English name, till the 16th century, for animals of the monkey tribe, and still used specifically for the tailless, manlike representatives of the order Primates.
Experiment shows that in the manlike (anthropoid) apes the differentiation of the foci or "centres" of movement in the motor field of the cortex is even more minute.
The accompanying simple figure indicates better than any verbal description the topography of the main groups of foci in the motor field of a manlike ape (chimpanzee).
ANTHROPOID APES, or Manlike Apes, the name given to the family of the Simiidae, because, of all the ape-world, they most closely resemble man.
A series of the apes, arranged from lower to higher orders, shows gradations from a brain little higher that that of a rat, to a brain like a small and imperfect imitation of a man's; and the greatest structural break in the series lies not between man and the manlike apes, but between the apes and monkeys on one side, and the lemurs on the other.