Figure 3. Prosthiostomum siphunculus a in Taxonomy of subtidal marine Polyclads from Tabarka (northwest Tunisia) with remarks on their habitat preferences

Figure 3. Prosthiostomum siphunculus a Dorsal view. Scale bar = 1mm. b Anterior region showing the arrangement of eyes. Note the presence of marginal eyes me and two clusters of cerebral eyes ce. Scale bar =10µ. c Ventral view of anterior region showing the paired prostatic vesicles pv. Prostatic canal pc. Scale bar =10µ. d Ventral view of anterior region showing the prominent stylet st. male gonopore mg, prostatic canal pc. Scale bar = 10µ. e section through male apparatus. Prostatic vesicle pv, male atrium ma, male gonopore mg, stylet st, median intestine mi. Scale bar = 10µ. f Section through female genital apparatus, note the presence of cement pouch cp in the vagina. female gonopre fg, main intestine mi. Scale bar =10µ.