The colonies originally start from larv produced in the ovicells of the zoaria. |
In the ponds at Port Canning the zoaria grow side by side with, and even entangled with those of Bowerbankia caudata subsp. |
Some of these last are penetrated by zoaria of Fredericella indica. |
Although the zoaria do not form compound colonies by secreting a common membrane or investment, they are markedly gregarious. |
The zoaria are circular or nearly so except when about to undergo division, in which case they are constricted in the middle. |