Tomopteris from plankton - a polychaete Photomontage of plankton organisms Plankton are the weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater. ... Orders Amphinomida Capitellida Chaetopterida Cirratulida Cossurida Ctenodrillidae Eunicida Flabelligerida Magelonida Myzostomida Nerillida Opheliida Orbiniida Orweniida Phyllodocida Pisionidae Polygordiida Protodrilida Psammodrilidae Sabellida Spionida Spintheridae Sternaspida Terebellida The Polychaeta or Polychaetes are a class of annelid worms, generally marine, with a pair of fleshy protrusions on each body segment called parapodia that...
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The lining membrane is ciliated in Aphrodita, Glycera, Polycirrus, Tomopteris, and Terebella; and it is curious that in these the blood-vessels proper are absent, with the exception of the first and last.
In Tomopteris their ciliary current carries spermatozoa inwards, and the same may occur in other forms.
The borers in shell, limestone, coral, and Melobesia, seem cosmopolitan, and the swimming Tomopteris is likewise widely distributed.
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