(a) A ganglion of size class 4 at a least expected to get mobilized configuration in the time interval between two rheons. (Emphasis is on the end-gate unit cells), (b) The two configurations for which an oil droplet may become stranded. In both cases, the driving force for mobilization is from left to right. represents the idealized radii of curvature of the o/w interfaces for advancing and receding contact angles.