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[[circled]] 23 [[/circled]]
[[underlined]] Cebus capucinus [[/underlined]], Jun. 13, 1959, V.

[[3 straight and 1 scribbled line run down the left margin]]


as his MGB's; but his BB's were certainly accompanied by more extreme PL with mouth quite widely open.

Although the relationship of these B patterns are clear, they are a little difficult to connect with other related patterns I have heard uttered by other animals. Perhaps the relationships of all the B and related patterns (if both adults & juveniles utter the same range of notes) might be represented by the following diagram:

                 ┌────► B Trll
                 │
   WB ───► MGB ──┼──────────► Screams
                 │
                 ├───────► Q ───► QTW
                 │
                 └──────► BT

E also did some select BT this morning. Just before he tried to bite me. It is obvious, I think, that BT can be provoked by quite a wide range of motivation, varying from quite strong to quite weak, as long as the attack drive is strongly predominant. E did BT before brief and not very vigorous attempts to bite.

Once or twice, when E was sitting rather unhappily on my shoulder, he made definite "Chewing" sounds!!!

He only did one Lsh today - when he seemed to be moderately upset or excited by my approach. Gave Wstl just before and as he did the Lsh, and an L Trll immediately afterwards.

[[underlined]] Cebus capucinus [[/underlined]], I.

Jun. 14, 1959
Barro Colorado

E behaving much as usual today.