In Flustra the young polypide-bud becomes connected with the 'brown body' by a funiculus.
"Freshwater Sponges, Hydroids & Polyzoa"
Nelson Annandale
There is a single funiculus, which connects the posterior end of the stomach with the base of the zooecium.
"Freshwater Sponges, Hydroids & Polyzoa"
Nelson Annandale
Its funiculus is rudimentary or absent.
"Freshwater Sponges, Hydroids & Polyzoa"
Nelson Annandale