A manual of elementary zoology . Zoology. HYDRA AND OBELIA. POLYPS AND MEDUSA. 175. --ect. -end. perith. Fig. 109.—Part of a colony of Obelia, magnified. bl., Blastostyle ; ect., ectoderm ;
Obelia longissima
how to draw obelia - YouTube
Obelia dichotoma
Obelia Life Cycle, classification & Labelled Diagram- Zoology