Incomplete Mesenteries: Mesenteries extending from the column wall into the coelenteron, but are not attached to the actinopharynx (Carlgren, 1949; p. 8). Incomplete is the more modern term and more commonly used when compared to the older term; imperfect.

Transverse Diagram at the level of the Actinopharynx:

See also Mesenterial arrangement

See also Mesenterial Muscles

See also Complete Mesenteries.

See also Perfect Mesenteries.

See also Imperfect Mesenteries.

See also Directive Mesenteries