Abstract
Transmission electron microscopy of thin sections of human (adult and newborn) and mouse erythrocytes revealed the occasional occurrence of a small round appendage (about 0.5μ in diameter) projecting, with a thin pedicle, from the surface mainly of the peripheral thick portion of erythrocyte. The appendage contained an accumulation of vesicles which was suggested to be derived from the membranes of cell organelles and segregated from the cell. This appendage probably corresponds to the “wart” of erythrocyte found under the scanning electron microscope (TOKUNAGA, FUJITA and HATTORI, 1969).
