“…Several aspects of its behavior, however, seem to set it apart, see for example Hawkes [1969], Chevalier-Skolnikoff [1972] and Kanagawa and Hafez [1973], Studies of the social behavior of stumptails have described certain social patterns in detail, e.g. Gouzoules [1974Gouzoules [ , 1975, Goosen [1974a, b], Estrada and Sandoval [1977], Rhine and Hendy-Neely [1978], Trollope and Blurton-Jones [1975] and Weisbard and Goy [1976], or behavior patterns in general, e.g. Bertrand [1969], Estrada and Estrada [1976], and Rhine and Kronenwetter [1972].…”