Derivatives of the mesonephric duct are all except

The nephric duct which is formed in relation to the developing excretory tubules. At later stages, becomes the mesonephric duct(Wolffian duct), The collecting pa of the kidney is derived from a diveiculum called the ureteric bud which arises from the lower pa of the mesonephric duct, Mesonephric (Wolffian) duct - male derivatives - Appendix of epididymis, Epididymis, Ductus deferens, Ejaculatory ducts, Seminal vesicle, Ureter, pelvis, calyces and collecting tubules. Mesonephric (Wolffian) duct - Female derivatives - Appendix of ovary, Duct of epoophoron. Ref:Inderbir Singh's Human Embryology, Eleventh edition, pg.no., 265, 286. table Ref:Inderbir Singh's Human Embryology, Eleventh edition, pg.no.,286(table - 10.6).