Series H. Consecutive sections through the hind end of the Müllerian duct, from an embryo in which the head-kidney was only represented by a rudiment. (The embryo was, perhaps, very slightly older than that from which Series D was taken.) Zeiss C, ocul. 3 (reduced one-third).
No. 1. Müllerian duct is without a lumen, and quite distinct from the Wolffian wall.
No. 2. The solid end of the Müllerian duct is no longer distinct from the internal wall of the Wolffian duct.
No. 3. All trace of the Müllerian duct has vanished.
Series I. Sections through the hinder end of the Müllerian duct from an embryo of about the middle of the sixth day. Zeiss C, ocul. 2 (reduced one-third).
No. 1. The Müllerian duct is distinct and small.
No. 2. Is posterior by twelve sections to No. 1. The Müllerian duct is dilated, and its cells are vacuolated.
No. 3. Penultimate section, in which the Müllerian duct is visible; it is separated by three sections from No. 2.
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.