Andersen,1 in 1938, gave a comprehensive analysis of the clinical laboratory and pathologic aspects of cystic fibrosis of the pancreas, basing her report on a series of 49 cases of the disease gathered from the files of the Babies Hospital in New York and from recent and past pediatric literature. Since then further cases have been recorded by her and by others. The following report describes another instance of the disease in which the diagnosis was proved by postmortem observations. REPORT OF CASE C. H. Jr., aged 7 months, was brought to the office of one of us (L. R.) for examination on April 24, 1941, because of "eighteen movements over the past three days," because of failure to gain and because of a severe cough not amenable to treatment. Pregnancy and Birth History.—The mother, a primipara, had an uneventful first, full term pregnancy. She delivered a 6