Sporangia fasciculate, confluent on a persistent hypothallus, dark fuscous; peridia very fugacious; stipes united at the base, erect, furcate; spores large, brown, globose.

The tail soon acquires the furcate form with which we made acquaintance in the last Prawn-Zoea described.

The stems are branched in a furcate manner and confluent at the base, forming a compact tuft.

The threads appear at first sight entirely simple, but are really several times furcate, and not infrequently anastomose.