32 CTENOPHORA. 



Class III. Ctenophora. 



Free-swimming hermaphrodites with eight rows of external ciliary 

 plates, with gullet (stomodseum) and gastro-vascular canals arranged 

 bilaterally. Usually with two retractile tentacles. Thread-cells replaced 

 by adhesive cells. Cydippe. Cestus Veneris. Beroe Forskalii. 

 Cceloplana, a creeping form. 



