INUCLEATED cells occur in a variety of tissues in plants and animals normally and under varying physiological conditions (e.g., anemia, stress, ageing, regeneration, malignancy and viral infection) (BLOOM 1968). Among animals, naturally occurring binucleated cells have been observed in organisms of the following classes: Protozoa, Nematoda, Crustacea, Arachnida, Insecta, Agnatha, Pisces, Amphib...