Figure 5 in The tail tells the tale: taxonomy and biogeography of some Atlantic Chelidonura (Gastropoda: Cephalaspidea: Aglajidae) inferred from nuclear and mitochondrial gene data

Figure 5. Mating sequence of two individuals of Chelidonura berolina belonging to two different colour forms. Single digit numbers indicate the sequence of events. Multiple digit numbers indicated the time at which the photographs were taken.