FIGURES 17–20. Spongia zimocca.17 in Revised description of a poorly known Mediterranean Dictyoceratid bath sponge, Spongia (Spongia) zimocca (Schmidt, 1862) (Porifera: Demospongiae: Dictyoceratida)

FIGURES 17–20. Spongia zimocca.17, End of primary fibers in a Tunisian specimen. 18, Primary and secondary fibers from a Libyan sponge. 19, Primary and secondary fibers from a Tunisian specimen. 20, Secondary fiber from a sponge collected near Agathonissi, at 60m depth.