"Diagram of an Ectoproctous Polyzoon (Plumatella). L., Lophophore; PH., pharynx; A., anus; S., stomach; M., retractor muscle; F., funiculus, a cord of mesodermic tissue; O., cells that form "statoblast" buds; B., an ordinary bud; E., epistome over the mouth; T., tentacles; Sh., outer wall of zooecium." -Thomson, 1916

Plumatella

"Diagram of an Ectoproctous Polyzoon (Plumatella). L., Lophophore; PH., pharynx; A., anus; S., stomach;…