Submucous fibroids form the most usual variety of uterine polypi. In some cases the overlying mucous membrane becomes much stretched and attenuated, and may finally rupture or slough. The fibroid tumor may then escape through the opening in the mucous membrane, and, having been extruded altogether from the uterine wall, may be expelled from the body by uterine contractions. The fibroid polyp, being exposed to septic influences from the vagina, may become inflamed and suppurate; or sloughing and disintegration may occur because of interference with the blood-supply in the pedicle. _The intra-ligamentous fibroid_ grows from the side of the uterus or from the supra-vaginal cervix. It pushes apart the peritoneal folds of the broad ligament, and grows between them or beneath them. The tumor is thus outside of the peritoneum. It may fill the whole pelvis with a dense unyielding mass, pushing the uterus to the pelvic wall, destroying anatomical relations, and exerting most disastrous pressure upon blood-vessels, nerves, ureters, and other pelvic structures. Sometimes, as these tumors enlarge in an upward direction, they carry with them overlying pelvic organs; thus the ureter may be found passing over the top of a tumor which, beginning as an intra-ligamentous pelvic growth, has become abdominal. In some cases the fibroid grows from the posterior aspect of the supra-vaginal cervix, passes beneath the bottom of Douglas’s pouch, pushes the peritoneum above it, and becomes a retro-peritoneal tumor. Again, it may grow from the anterior aspect of the cervix in the vesico-uterine space, and as it extends upward may push the vesico-uterine fold of peritoneum above it and drag up the bladder, so that this viscus is sometimes found spread out upon the anterior face of the tumor and extending as high as the umbilicus. As has already been said, fibroid tumors are usually multiple, and if one of the terms designating the position of the tumor as subperitoneal or intra-ligamentous is used to describe any case, we understand that the chief tumor-mass is of this character. The fibroid polyp is more likely to be single than any of the other varieties. In fact, the fibroid polyp is usually single; that is, no other fibroid tumor can be detected in the body of the uterus. This is not always the case, however, and sometimes the repeated expulsion of successive fibroid polypi from the same woman renders it probable that several nodules were simultaneously present in the uterine wall.