BRITISH ZOOPHYTES. 293 



This is probal)ly a deep-water species. The cells 

 are large and ovate, without spines or punctures. The 

 orifice is circular, and somewhat pointed. On each 

 cell is a rostrum and an avicularium, and avicularia are 

 freely scattered about the colony. 



7. C. CosTAzii, Audouin. 



C. bimucronata (Hassall), C. Hassallii {Bush, McA., 

 Manzoni, Alder), Lepralia Hassallii (Q. J., D. L.), Celle- 

 porina Hassallii {Gray), Celleporaria Hassallii (^Smitt). 



Hab. : Cornwall, Devon, Isle of Man {T. H.), Ayrshire 

 (D.L.), The Minch {A. M. N.), Bamborough (Alder), 

 Peterhead (O.TF. P.). 



This species forms thick crusts on zoophytes, sea- 

 weeds, &c. The cells are often superimposed. They 

 are large and cylindrical. The orifice is wide, with a 

 sinus on the lower margin, and " an erect tubular 

 process on each side bearing a small avicularium.'^ 

 The ovicels " mimic the swollen lobes of the flower of 

 a calceolaria." — Johnston. 



Sub-Oeder II. : CYCLOSTOMATA. 



FAMILY I CRISIID^. 



Zoarium dendroid, calcareous, composed of segments 

 united by corneous joints. Zocecia tubular, disposed in 

 one or two series. — T. H. 



Genus I. Crisia, Lamourovs (part). (From Crisia, 

 a daughter of Oceanus.) 



Zocscia in a single series, or in two alternate series. 

 — T. H. 



