Experience corroborates the contention that perforative appendicitis is one of the most grave and, fortunately, one of the most infrequent complications of pregnancy with which the surgeon has to deal. That a dissemination of our present-day knowledge of the complication is needed is exemplified by the high mortality and the frequency with which the autopsy findings bring the first intimation of the true cause of the clinical picture. A sufficient number of cases of appendicitis complicating pregnancy has been reported to enable us to draw important conclusions for our future guidance. At present our object is to briefly present these findings and to report a successful case in point. HISTORICAL DATA. Hancock,1in 1848, reported the first clear case of appendicitis complicating pregnancy. Ten days after a premature delivery Hancock incised a perityphlitic abscess. The patient recovered. In 1885 Korn,2and in 1888 Müller,3cited a case