On the histogenetic potency of the tailbud mesoderm.

The caudalmost part of the tailbud mesoderm (terminal paraxial tailbud mesoderm) does not develop into somites. It is not clear whether this terminal paraxial tailbud mesoderm can be considered to be a part of the segmental plate. To elucidate the nature of the tailbud mesoderm, grafts containing caudal somites, caudal prospective somitic mesoderm and the terminal paraxial tailbud mesoderm were grafted from quail embryos into the wing bud mesoderm of chick embryos.

[Three cases of ectopia of the ureter opening into the seminal vesicle and the epididymis (author's transl)].

Three cases of Ectopia of the ureter are described. In one case the normal left hand kidney showed a connection between its lower calices and the epididymis on the same side. The vas deferens was normally developed.