189 



GENUS II. BUNODES (Gosse). 



Actinia (Ellis). 

 Cribrina (Ehrexberg). 



-Base exceeding the column ; its outline generally 

 undulate. 



Column pillar-like ; the height in extension consi- 

 derably exceeding the diameter. Surface studded 

 with permanent rounded warts, set in vertical lines, 

 which are separated by bands of plane skin. Margin 

 denticulate. Substance firmly fleshy. 



Disk flat, circular in outline ; scarcely overlapping 

 the column. Radii conspicuously marked. 



Ten fades not very numerous, arranged in several 

 rows, snbmarginal ; moderately long and slender, 

 obtusely pointed, smooth, not very flexuous ; marked 

 (in the more typical species) with irregular white spots 

 on the front face ; perfectly retractile. 



Mouth not raised on a cone ; stomach not habi- 

 tually protruded : gonidial tubercles generally conspi- 

 cuous. 



ANALYSIS OF BRITISH SPECIES. 



Warts generally distributed. 



Warta large and small in alternate lines gemmacea. 



Warts subequal. 



Warts vertically remote, unicolorous thallia. 



Warts vertically contiguous, red-spotted Ballii. 



Warts only on upper half of column coronata. 



