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[[circled]] 20 [[/circled]] [[underlined]] Cebus capucinus [[/underlined]] Jun. 13, 1959, II. [[lines run vertically down the left margin]] And, when he is put on my shoulder, he can be persuaded to stay there - although reluctantly. I have been studying his calls almost all day. I now have a pretty good idea of what his repertory is. I shall have to re-order my previous ideas a little, but not too much. The notes he has uttered today might be represented by the following diagram: ┌──► S Trll ───► L Trll │ Squ ───► Wstl ──┤ │ ┌───► AlB └──► WB ─────► MGB │ └───► BB (This presumably is not the whole repertory he is capable of producing. He must be able to utter Screams, if nothing else - and probably a lot more.) All the sounds E uttered today were obviously restricted to particular circumstances; so I have a very good idea of what their motivation must be. (I am, in fact, almost convinced that I have solved all the problems connected with these particular calls). The first group of patterns might be called "the Squ-Wstl Complex". My previous descriptions of these patterns were pretty good. All these patterns are fairly soft whistle-like notes; some short (Squ) and some long (Wstl) apparently connected by a complete series of notes of intermediate length. Obviously relatively very low intensity given by the animal when I wasn't very close, or, at least, he didn't seem to be reacting to me very vigorously, not not moving around his cage very actively or very rapidly. (As soon as I did come closer, or he began to move about more rapidly, the Squ-Wstl