Phyllidia fontjei sp. nov. Images showing a selection of the histological slides. A. Oral tube; B. Oral tube and transition into oral glandular part (GOT); note dorsoventral muscle bundles (star); C. Pharynx emerging from GOT, and oesophagus in nerve ring; D. Gonad; arrow indicates area of sperm production lying in between the gonad follicles with oogonia production; E. Receptaculum seminis and various parts of nidamental glands with areas of exuded mucus; F. Cross section of penis (twice) with tiny spines (arrow), probably at the tip of the penis. Abbreviations: bgl blood gland, cgl cerebral ganglion, got glandular oral tube, nigl nidamental glands, oe oesophagus, oog oogonia in female gonad follicles, ot oral tube, ph pharynx, rs receptaculum seminis, spg spermatogonia, spi spicules in body wall.