What is an extensive suborder of marine Bryozoa, mostly with calcareous shells. They have a movable lip and a lid to close the aperture of the cells. [Also written Chillostomata.] called?

chilostoma — An extensive suborder of marine Bryozoa, mostly with calcareous shells. They have a movable lip and a lid to close the aperture of the cells. [Also written Chillostomata.]. (Webster's 1913.)