Student Project Figures Figure 2 Individual P. stolonifera adult collected from rocky intertidal zone at Caloundra Head, Caloundra, Queensland. Buchal (anterior) and atrial (posterior) siphons can be observed including top and basal ends of the animal (adapted from Day 1974; Kott 1985). Figure not to scale.  Figure 2 Figure 3 Figure 4 Figure 5