Remnants of an embryonic structure on the sperm-conducting duct.
The vestigial remains of part of the embryonic *mesonephros that are found near the testis of the adult. Some of the mesonephric collecting tubules persist as the functional vasa efferentia but the rest degenerate almost completely. A similar vestigial structure (called the paroophoron) is found in females.
The atrophic remnants of the tubules of the wolffian body, situated on the spermatic cord above the epididymis.