Fig. 3 in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan

Fig. 3. Tetrastemma carneum sp. nov. (paratype), photomicrographs of transverse sections. A, Frontal organ (arrowhead); B, precerebral vessels (arrowheads); C, cerebral organs; D, brain; E, proboscis; F, posterior glands of cerebral ganglia; G, intestinal caeca; H, intestine; I, stylet apparatus. Abbreviations: ag, acidophilic glands; bg, basophilic glands; br, brain; co, cerebral organ; in, intestine; st, stomach. Scale bars: A–C, 100 µm; G, 50 µm; D–F, I, 75 µm; H, 150 µm.