No. 4. Last section in which any trace of the Müllerian duct is visible; the lumen, which was visible in the previous section, is now absent.
No. 5. No trace of Müllerian duct. Nos. 3, 4, and 5 are consecutive sections.
Fig. K. Section through the hind end of the abdominal opening of the Müllerian duct of a chick of 123 hours. Zeiss C, ocul. 2 (reduced one-third). It illustrates the peculiar cord connecting the Müllerian and Wolffian ducts.
[424] From the Quarterly Journal of Microscopical Science, Vol. XIX. 1879.
[425] “Das Urogenital-System der Plagiostomen,” Arbeiten a. d. zool.-zoot. Institut. Würzburg.
[426] “Zur vergl. Anat. u. Entwick. d. Excretionsorgane d. Vertebraten,” Morphologisches Jahrbuch, Vol. IV.
[427] “On the Origin and History of the Urinogenital Organs of Vertebrates,” Journal of Anat. and Phys., Vol. X. [This Edition No. VII.]
[428] Arbeiten a. d. zool.-zoot. Institut. Würzburg, Vol. IV.
[429] Beitr. zur Anat. u. Entwick. d. Geschlechtsorgane, Inaug. Diss., Zürich, 1876.
[430] Proceedings of Royal Society, 1878.