Name: Cyananthea hydrothermala
Reference: Doumenc D. A. and Van-Praët M., 1988, Page 66 , fig. 3
View: Sphincter muscle
Caption: "Micrograph showing transverse section of the mesogleal sphincter (S) of *Cyananthea*. M: mesoglea." Reprinted with permission of Elsevier Science.