Cyclo stomata (sik los to mat a)

pl. [NL., neut. pl. of cyclos to mat us: see cyclostomatous.] 1. A division of gymnolæmatous polyzoans having tubular cells, partially free or entirely connate, a terminal opening with a movable lip, and no avicular i a nor vibracula: opposed to Chi los to mat a and Ctenostomata. It is subdivided into Articulata or Radicata (family Crisiida ), and Inar ticulata or Incrust at a, containing the rest of the families. 2. In Günther's system of cla ification, a subcla of fishes having the following technical characters: the skeleton cartilaginous and notochordal, without ribs and without real jaws; skull not separate from the vertebral column; no limbs; gills in the form of fixed sacs without branchial arches, 6 or 7 in number on each side; one nasal aperture only; mouth circular or sucker-like; and heart without bulb us arteriosus. Also called Cyclos tom i, Cyclo stomia, Marsipobranch i i, and Monorhina.