The cleavage of the ovum follows two types, both seen in Tubularia (Brauer ).
- Diagram of Tubularia entiated into nutritive and indivisa.
H, With spadix branched (Cordy- B, Type of Tubularia.
In Tubularia by a process of decapitation the hydranths may separate off and give rise to a separate individual, while the remainder of the body grows a new hydranth.
- Free Actinula rhiza from which a polyp appears to be of Tubularia.