218 HISTORY OF BRITISH ZOOPHYTES. 
** Coral with terminal cells. OcELLINa. 
Coral free, the base pointed. 'TurBINOLIA. 
Coral fixed, the base expanded. CaRYoPHYLLEA. 
Sect. II. Body coriaceous or fleshy. 
* Polypes associated by a common base (gemmiparous). 
ZOANTHINA, Hhrenberg. 
Base root-like, creeping. ZoANTHUS. 
** Polypes separate and single (ovo-viviparous). ACTINIA, 
threnberg. 
Tentacula in uninterrupted circles. ACTINIADA. 
+ Tentacula imperforate. 
Body invested in a lobed epidermis. Capnza. 
Hpidermis normal. CoryNactis. 
++ Tentacula tubular, retractile. 
Base broad, the animal immoveable. ADAmMsta, 
Base broad, the animal locomotive. ACcTINIA. 
Base narrow, the animal unfixed. IJLuANTHOs. 
+tt Tentacula tubular, not retractile. ANTHEA. 
Tentacula in tufts, at distant intervals. LucERNIADA. 
One genus only—LucERNaRria. 
