An unfortunate error in the preceding issue of Blood (June 1949), in the section on correspondence concerning revised hematologic nomenclature, gives a misleading impression. Page 781, the first sentence following the references to Dr. Osgood's letter should read : "A subsequent letter received from Dr. Jones indicates that Dr. Downey was unable to attend two of the last meetings of the Committee, and that he does not agree on all points with the report." (instead of ". . . indicates that he was unable to attend . . . ").