In speaking of anemia in infancy Cabot (1) says there is apt to be (a) enlargement of the spleen, (b) leukocytosis, (c) high color index, with megalocytic blood picture, (d) erythroblasts, many of them megaloblasts, (e) abnormal leucocytes (myelocytes, stimulation forms), and that these findings make it so difficult in infancy to recognize the type of blood disease from the blood alone that the attempt should not be made—a view borne out in detail by the following case.
Case history: In October 1924, a twelve months old baby was referred to me by Dr. A. F. Thompson of Troy, N.