Immergentia californica Silén, 1946

The zoids are arranged in straight rows. Fom a main row lateral rows emanate at irregular interspaces.They form acute angles with the main row and extend more or less in the same direction. The secondary processes from the zoidsare few.

The lengt of the zoid averages 0.35mm, its breadth 0.1 mm. Its proximal end is evenly pointed. The number of the tentacles is 10.