Marmoset, a name given to a group of American monkeys which are always of small size, and which differ in various particulars from other American monkeys (see MONKEY). The popular name of Ouititi has been given to these monkeys on account of the sharp whistling sound which they make when frightened or irritated.
There are a good many species of marmosets which are placed in two genera, Midas and Hapale, both confined to Central and South America. These creatures are easily kept in captivity, and are usually of an affectionate disposition.