CELLEPORIDiE. 01 



Polyzoarium adnate, irregularly convex, or subcorneal. Cells distant, connected 

 by ridges, sparsely punctured ; orifice orbicular, with a sinus in front ; cylindrical 

 tubular processes supporting avicularia, arising from the front or side of a cell, or from the 

 intercellular ridges. 



Habitat. — C. Crag, on shell, S. W. {Recent) Britain, South and West Coasts, 

 G. B. ; Coast of France, Jeffreys. Lamlash Bay, Arran. G. West. 



This species has been doubtlessly confounded with Cellepora jJumicosa, with which it 

 agrees very closely in external character ; but the distinction between the two is obvious 

 enough on closer examination. C. tubiyera has a smaller mouth, with a sinus in front ; 

 and instead of the strong conical rostrum, with an avicularium in its inner aspect, so 

 characteristic of Cellepora pmnicosa, most of the cells are provided with slender sub- 

 cylindrical ascending processes, having a small avicularium at or near the summit. The 

 cells, also, are rather more punctured than they usually are in Cellepora pumicosa. 



7. C. scRurosA {n. sp.?) PL IX, fig. 9. 



Polyzoario raassivo, irregulari, adnato. CelluHs urceolatis ?, contiguis, crassis super- 

 ficie Integra, subinde rostro minuto suborali armatis. Ostio orbiculari, antice sinuato. 



Polyzoarium massive, irregular, adnate. Cells urceolate? contiguous; wall very 

 thick ; surface entire ; orifice orbicular, with a sinus in front ; sometimes a minute 

 rostrum before the orifice. 



Habitat.— C. Crag, on shell, ? S. W. 



This species is given with much hesitation, for the only specimen at command is 

 hardly in a state to admit of precise determination. The most striking peculiarity is the 

 comparatively great thickness of the walls of the cells. 



8. C. PARASITICA, Michelin. PI. IX, figs. 11, 13. 



Polyzoario incrustante, massivo, irregulari. Cellulis urceolatis, ventricosis, dis- 

 tantibus, subinde rostratis ; spatiis inter cellulas punctatis. Ostio suborbiculari, antice 

 sinuato. 



Polyzoarium encrusting, massive, irregular ; cells urceolate, ventricose, distant ; mter- 

 cellular spaces punctured ; orifice suborbicular, with a sinus in front ; occasionally a rostrum 

 in front, or on one side of the cell. 



C. PARASITICA, Mich., Icon. Zoopli., p. .'52G, pi. Ixxviii, fig. 'S. 



