Fig. 4 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines

Fig. 4. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A–C, Precerebral regions; D, proboscis insertion; E, anterior brain region; F, middle brain region just before ventral ganglion bifurcates into superior and inferior lobes; G, posterior brain region; arrowheads indicating nerve fibres leading to buccal nerves sent out antero-ventrally from a commissure between inferior lobes of ventral ganglia.