TWO MORPHOLOGICAL TYPES OF PARTICULATE INCLUSIONS IN MARINE DINOFLAGELLATES12

Two species of laboratory-reared nonbioluminescent dinoflagellates, Gymnodinium splendens (photo-synthetic) and Crypthecodinium cohnii (hetero-trophic), were observed to posses abundant quantities of randomly moving structures, which are contained in vacuoles. When viewed with the electron microscope, 2 shapes of regular, geometric particles, here termed particulate inclusions, were observed. The morphology of the particulate inclusions is described.