ClipArt ETC
"Hydroids. IV A. Campanularian. IV B. A fragment enlarged, showing stalked hydrothecae (H.), a gonotheca (G.); C., the coenenchyma; P., the perisarc; S., a stalk." -Thomson, 1916

Campanularian Hydroid

"Hydroids. IV A. Campanularian. IV B. A fragment enlarged, showing stalked hydrothecae (H.), a gonotheca…