BRITISH ZOOPHYTES. 291 



one or more ascending rostra in connection with it^ 

 bearing avicularia. Zoariitm incrusting, often com- 

 posed of many layers of cells^ or erect and ramose. — T. H. 



1. C. PUMicosAj LinncBus. 



Cellepora verrucosa [Linn., Fahr.), C. spinosa (Turt.), 

 Millepora pumicosa {Pallas, E. and 8., Stew.), Madre- 

 pora verrucaria [Espcr). 



Hab. : Common. On stems of hydroids and algge. 



This is the " Porous Eschara " of Ellis, and the 

 ''Pumice-stone Coral ^' of Couch. It forms a porous, 

 friable, calcareous mass generally occurring in small 

 patches varying in colour, sometimes pinkish, some- 

 times dirty white. The zooecia are oval, but vary 

 according to the substance which the zoophyte is 

 incrusting. They are smooth, and have a circular 

 terminal orifice, with a large rostrum in front bearing 

 an avicularium. 



The polypide is orange-coloured. 



2. C. RAMULOSA, Linnoius. Plate XXI. fig. 9. 

 Cellepora pumicosa var. (Sars), C. rameux [DeBl.). 

 Hab. : Cornwall, Devon {T. H.), Hastings (Miss 



Jelly), St. Andrews [McI.), Shetland {A. M. N.). 



This species, called by Couch the '^ Branched Celle- 

 pore," grows to a height of two or three inches, and 

 " resembles foreign corals in miniature." While livino" 

 it is flesh-coloured, changing to white on death. The 

 branches are short and stout, and roughened by the 

 projecting rostra of the zooecia. The cells are smooth 

 and tubular. The orifice is produced into a large 

 pointed rostrum bearing an avicularium. 



The polypide is flesh-coloured. 



This is a rather deep-v;-ater species, and is found on 

 the stems of Sertulariae, &c. 



u 2 



