*Read, in part, at a meeting of the Rand Medical Discussion Club of the Medical Graduates Association of the University of Witwatersrand on 29 May, 1951. The references will be published at the end of the second part of the paper.
A brief descriptionption of constriction and retraction rings is given. A case is descriptionbed in which a ring was found at caesarean section this was considered to be a constriction or contraction ring. The case is unusual in that the constriction was palpable at laparotomy and because one was able to obtain a photograph of the ring.