Semibozeloxids are char. by vibracula (calyform, Bugulidae) even in some anacans Conocharelidae. Theory regarding occurrence of Avie. + Vibracula 2 theories 1) unicular dev. due to prevention of lateral budding 2) Many buds + lat. ones are reduced or suppressed 3) Maybe lateral occurring after calcifia + their polypide is reduced in opportanitis Cenozooid. 1) no polypide, just wall 2) almost squeezed. betw. autogooecia has funiculus, pore plates 3) Stolon chains of cenozoids. Stolon -> pore plate modif. Membranipora lateral buds became stolon in G's exp't. Chonizophora bronhanti. Cenozooids (mass of openings betw zooids). Now dictellae Halopoma chelopsoids double wall betw. dictella + d.w. betw. d. + autozoid Is dictella a pore plate or a cenozoid. Is pore plate a bud? Radicells. Burgula & Semiposell radicles are not nec. prerequisite (Rootlets have funiculus & thins) Tower cell Membranipora phenomenon in aging colonies under certain conditions ptc.