A Speculum-Camera

the uterus, that it seems highly improbable that they could have originated from the endometrium. In all the other cases the growth was closely connected with the back of the uterus, so that the endometrial origin was at least possible. My original view that these isolated growths were derived from Wolffian remnants is, I think, now untenable. The possibility, however, that they are derived from the Miillerian ducts, at the place where the fused ducts join the solid mass of cells from which the vagina is developed, cannot be disproved. The actual mode of formation of the vagina is not yet settled, and it is, at all events, possible that groups of cells mnight become detached from the hinder end of the Muillerian ducts, and by taking on separate growth and canalization, might form a new growth resembling the endometrium. The method of origin, that these growths are derived from the peritoneal endothelium, appears to me to be an unnecessary theory, when two, at least, of the other three theories seem to be so much more likely. Tubular structures certainly are sometimes seen in the broad ligaments which appear to be of peritoneal origin, but they are never associated with endometrial stroma or with a new growth of muscle and fibrous tissue. In none of the cases hitherto described has the possibility of an endometrial and Muillerian origin been absolutely negatived.