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[[circled]] 47 [[/circled]]
[[underlined]] Cebus capucinus [[/underlined]], Feb. 5, 1961, VI.  

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d.  I couldn't tell if they were loud S Trll's or L Trll's.  Then when it was on the floor it alternated periods of lying flat with periods of crawling, or trying to crawl, forward.  Uttering lots of the same loud Trll's and (usually double) BB's.  There may have been a slight, statistical, correlation between periods of lying flat and uttering BB's and period of crawling with Trll's; but both types of calls were uttered in both circumstances.

Then I picked Osk up and put it back in its towel.  At first it continued to utter both Trll's and BB's and repeatedly bit the towel.  It showed a definite tendency to utter a Trll immediately before a bite.  Then it stopped uttering Trll's and biting, and fell quiet, only uttering an occasional Squ (and one MGB).

It is possible, I suppose, that the Trll's are produced by exactly the same motivation as the BB, at a lower intensity - but I doubt it.

[[underlined]] Cebus capucinus [[/underlined]], I  February 15, 1961
Barro Colorado

I have not had much time to watch Osk recently; but his behavior does not seem to have changed much recently.  Only quieter and, presumably, happier.

He has been feeding himself a little for at least a week now.

Today I took him out of his cage and put him alone on the floor.  Uttered a huge variety of notes, all in a jumble.  Squ's, Eyk's Wstl's, S Trll's, MGB's, brief undifferentiated B's (like MGB's but less plaintive), and a few single and double BB's.  Then, when I put my hand down beside it, he leapt on it, grasped it, uttered two or three BB Notes, and then just clung there, silent and apparently quite content