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GENUS I. BALANOPHYLLIA (Wood). 
Corallim simple, adherent, sub-pedicellate, cylin- 
drical, or sub-conical. 
Columella well-developed, but not projecting at the 
bottom of the calice ; of a sponge-like appearance. 
Plates thin, close-set ; those of the last cycle well- 
developed. 
Bibs distinct, narrow, nearly equal, crowded. 
The Animal is actinia-like, richly coloured, with a 
protrusile mouth, not conspicuously furrowed, and 
bluntly-pointed, warted tentacles, without terminal 
knobs. 
There is only one British species, B. regia. 
