Figure 2 in Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)

Figure 2. Transverse sections to show the rhynchocoel vessel (indicated by an arrowhead) in cephalotrichids. (A) Cephalothrix cf. simula (Iwata, 1952) (ZIHU 3517); (B) Cephalothrix cf. fasciculus (Iwata, 1952) (ZIHU 3515); (C) Cephalothrix filiformis sensu Iwata (1954) (ZIHU 3177); (D) Cephalothrix filiformis (Johnston, 1828) (ZIHU 3511). Scale bars: A = 100 µm; B = 30 µm; C, D = 50 µm.