282 
GENUS II. AURELIANIA (Gosse). 
(Gen. nov.) 
Corynactis (Thompson). 
Base expanded, adherent. 
Column conico-cylindrical, low, the margin forming 
a thick parapet with a fosse. Surface smooth, without 
suckers or loopholes : invested with a deciduous epi- 
dermis. Substance firm and coriaceous, opaque. 
Bisk flat, entire ; radii distinct. 
Tentacles in several rows, very short, knobbed ; the 
heads more or less bilobate, and differing in form in 
the different rows ; perfectly retractile. 
Mouth slit-like, furrowed : stomach-wall protrusile. 
ANALYSIS OF BRITISH SPECIES. 
Base greatly expanded : crimson augusta. 
Base not exceeding column : yellow Tieterocera. 
