Male genital pore in Pheretima represents the opening of

In 18^th segment, vasa deferentia of each side are joined by a prostatic duct forming common spermatic and prostatic duct which is a muscular sheath enclosing two vasa deferentia and one prostatic duct. This opens out by male genital pore. Each male genital pore, in fact, is a combination of three separate pores, i.e., two openings of vasa deferentia and one opening of common prostatic duct.