Black-headed, i. [175]

Uakarí Monkeys, i. [174], [248]

Red, i. [176]

unicolor, Cebus, i. [209], [217]

ursina, Alouatta, i. [198]; ii. [210], [255], [256]

Stentor, i. [193], [198]

Ursine Guereza, ii. [93]

Ursine Langur, ii. [122]

ursinus, Colobus, ii. [93], [94], [95], [245]

Cynocephalus, i. [263]