Half of a large colony, the flagellates embedded in a common jelly.
- Flagellates, in the great majority of instances haemal parasites, derived from a biflagellate, Bodo-like type, in which the posteriorly-directed (trailing) flagellum is always present and attached to the body by an undulating membrane, of which it constitutes the thickened edge.
The affinities of the Dinoflagellata are certainly with those Cryptomonadine Flagellates which possess two unequal flagella; the zoospores or young of the Cystoflagellates are practically colourless Dinoflagellates.
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