MS of microscopic creatures, diatoms, looking like tiny hourglasses, in water. HA MCU of microscopic organism floating in water, spinning round and round, could be a formaminiferan protozoa. HA MCU of microscopic organism, could be shelled ameboid protozoa like formaminiferans or invertebrate larval form floating. HA MCU of microscopic creature (possibly diatom, basic marine food plant) in water, has gill-like appendages, twitching them quickly. HA CU of microscopic creature (possibly a formaminiferan or an invertebrate larval form) floating in water, looking like spikes. (LETTERBOXED MATERIAL) (41223)