Figure 2

The eversible vesicles and small tiny papillae. (A) An eversible vesicle. (a) Distal part of the eversible vesicle; (b) basal part of the eversible vesicle; (c) the ventral tube; (B) small papillae on the basal part of the eversible vesicle; (C) small papillae on the distal part of the eversible vesicle. Scale bars = 0.02 mm.