Fig. 1. (A,B) Vonones sayi (from Lake Placid, Florida, USA). The animal is shown in ventral view, first (A) with droplets of newly formed effluent at anterolateral corners of prosoma, then (B), moments later, after having dipped a foreleg into one of the droplets, in anticipation of using that leg to brush the liquid onto an enemy. (C,D) Acanthopachylus aculeatus. In the first stage of its defensive response (C), enteric fluid has accumulated to form two droplets on the lateral carapace channels (arrows). Moments later (D), yellow quinonoid secretion has been injected into the enteric fluid.