Some monkeys are talkative and others taciturn. Some of them are vicious and some stolid, while others are as playful as kittens and as cheerful as sunshine. I regard the Cebus as the most intelligent of monkeys. In fact I have called him “The Caucasian of monkeys.” The new world monkeys seem to be more intelligent and more loquacious than the old world stock, but this remark does not include the anthropoid apes. As a test of the musical taste of monkeys, I took three little bells and suspended them by a like number of strings. The bells were all alike except that from two of them the clappers had been removed. Dropping the bells through the meshes of the cage at a distance of ten or twelve inches apart, the monkey was allowed to play with them. He soon discovered the one containing the clapper. He played with it and became quite absorbed with it. He was then attracted to another part of the cage, during which time the position of the bells was changed. On his return he found his favorite bell without a clapper. He then turned to another, and then another, until he found the one with the clapper. This indicated that the sound emitted by the bell was at least a part of its attraction. During the time that I used the phonograph in studying the monkeys, I repeated many musical records to them and found that some evinced fondness for the music, others were indifferent to it, and a few showed aversion to it. It appeared that the monkeys that were most attracted by musical sounds enjoy the repetition of a single note rather than the melody. It is possible that music, as we understand it, is too high an order of sense culture for them. The single note of a certain pitch seems to attract and afford pleasure to some of them, but they do not seem to appreciate rhythm or melody.