Sentence Examples with the word actinian

Moreover, there are some modern corals in which the secondary cycle of mesenteries departs from the Actinian plan.

Duerden has shown that in Porites the ordinary zooids possess only six couples of mesenteries arranged on the Actinian plan.

A pause in the development follows, during which no new mesenteries are formed, and then the six-rayed symmetry characteristic of a normal Actinian zooid is completed by the formation of the mesenteries V, V in the lateral chambers, and VI, VI in the sulcolateral chambers, their muscle-banners being so disposed that they form couples respectively with II, II and I, I.