Abstract
I confirm that the pigment-bearing cell of blue nevus corresponds histologically to the endo- or perineurium of mesoderal nature, There-fore I guess that the Mongolian spot cell originates from the same origin of blue nevus and that it is the mesodermal melanoblast which corresponds to Weidenreich's so-called perineurale Pigmenthülle.
And I agree to the polymeric inheritance theory of Mongolian spot according to the physiologic-genetical considerations.
N. B. In my previous report I used the term “chromatophore” but I revise this in present treatise and advocate the “Pigment-bearing cell” in order to avoid the liability of misunderstanding because in the strict sense “chromato-phore” has merely the ability of phagocytosis of pigment,
