CCELENTERATA. Ill 



11. In the Actinozoa there is only the polyp condition 

 Most of the species produce coral. 



12. The Scyphomedusce are medusae, the young of which 

 are polypoid in character. 



13. The CTENOPHORA are free-swimming; they lack 

 nettle-cells. Most characteristic are the eight meridional 

 rows of vibratile combs. 



