Sooty, ii. [37]

White-collared, ii. [38]

White-crowned, ii. [39]

Mangabeys, i. [252]; ii. [1], [36], [37]

Mantled Howler, i. [202], [203]

marginatus, Ateles, i. [231], [239]; ii. [255]

Marimonda, Le, i. [244]

Marmoset, i. [129], [131]; ii. [146]

Black-tailed, i. [136]

Common, i. [132]