Studnička, Sitzber. k. böhm. Ges. Wiss., 1899, No. xxxvii.
Chun, loc. cit. p. 536.
It is probable that the archinephric duct is derived from the embryonic epiblast; hence the suggestion that in the primitive Vertebrates the duct was a longitudinal groove in the superficial skin into which the pronephric tubules opened externally.
W. Müller, Jen. Zeitsch. ix. 1875, p. 107; Semon, Carl Gegenbaur's Festschrift, Leipzig, 1896, iii. p. 169.
Jungersen, Zool. Anz. xxiii. 1900, p. 328.