THE relation of the anterior pituitary to the metamorphosis of Amphibia has provided a means of securing more intimate knowledge of the endocrine activity of this portion of the pituitary gland. The effects of extirpation and implantation of the gland upon the development of the larval forms indicated its relationship to metamorphic change, but the preparation and suitable administration of ext...

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...