BRITISH ZOOPHYTES. 147 



BRITISH ZOANTHAEIA. 



Sub-Order: MALACODERMATA (Actiniatiia). 



FAMILY I. ACTININ^ (hexactinm). 



Malacodermata with never less than twelve septa, and 

 having the tentacles disposed in cycles^ corresponding 

 with the internal divisions. 



Sub-family I. Saqartid^. 



Species possessing acontia, and having a strong meso- 

 dermal circular muscle and numerous simple very con- 

 tractile tentacles. Body wall smooth. Septa more than 

 twelve in number. Principal septa only perfect, also 

 sterile, all the remaining septa being imperfect. 



Genus I. Actinoloba, De Blainville. {Actinia, and 

 Xo^of, a lobe.) 



Body pillar-like when extended. Body wall smooth, 

 pierced with loopholes. Disc deeply frilled at the 

 margin. Tentacles short, slender, not arranged in dis- 

 tinguishable circles, scattered at the commencement, 

 about half-breadth of the disc becoming gradually 

 smaller, more numerous, and densely crowded as they 

 approach the border. Mouth with a single gonidial 

 groove, surmounted by a single pair of tubercles. — 

 GossE. 



L 2 



