Figure 3 in Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)

Figure 3. Schematic diagram of sagittal sections of the cephalic region of cephalotrichids, showing three types of rhynchocoel vessel morphology. (A) Type A, found in Cephalothrix adriatica, Cephalothrix hongkongiensis, Cephalothrix kefersteini, Cephalothrix oestrymnica, Cephalothrix orientalis, Cephalothrix rufifrons, Cephalothrix cf. fasciculus and Cephalothrix cf. simula; (B) Type B, found in Cephalothrix filiformis sensu Iwata (1954); and (C) Type C, found in Cephalothrix filiformis s.str.