In the Phylactolaemata, however, a new colony may originate not only from a larva, but also from a peculiar form of bud known as a statoblast, or by the fission of a fully-developed colony.
The mesodermic portion becomes charged with a yolk-like material (y), and, on the germination of the statoblast, gives rise to the outer layer (mes) of the bud.
The production of a polypide by the statoblast thus differs in no essential respect from the formation of a polypide in an ordinary zooecium.
- Section of a Germinating Statoblast of Cristatella mucedo.
Sp, Anchoring spines of the statoblast.