The forms of galagos are very different from those of lorises and pottos. The arms and legs are comparatively longer and more slender, with rather long fingers and toes. Head and body length is 105-465 mm. The ears are large and mobile. The hind limbs are considerably longer than the forelimbs.
Males have a baculum, and females usually have two pairs of mammae.
In lorises and galagos the lower incisors project forward and slightly upward, the canines are long and sharp, and the molars have three or four cusps. The orbits in lorises and pottos face more directly forward than in the galagos. Lorises and pottos are essentially arboreal and nocturnal, sheltering by day in hollow trees, in crevices of trees, or on branches. They generally sleep in a flexed position, with the head tucked between the arms. They move quickly at times but do not leap or jump.