G. CELLEPORA. 39 



PIERCED. 



6. CELLEPORA/)er^Msa. Concretions forming round 

 patches from one to two centimetres in diameter. 

 Cells gibbous, with a small round mouth. 



On the Thalassiophytes of European seas. 



LIPS-FORMED. 



7. Cellepora labiata. Cells egg-shaped, rayed, and 

 imbricated : opening large, and formed like two lips, 

 the upper arched, the lower shorter, and more straight. 

 —Plate 1. fig. 2. 



Australasia. 



8. Cellepora manguevillana. Surface of the cells 

 covered with tubercles, invisible to the naked eye, and 

 placed in vertical lines.— Plate 1. fig. 8^ 



Bay of Cadiz. 



warty. 



9. Cellepora verrucosa. Cells in globular or oval 

 masses ; openings slightly three-toothed. 



European seas. 



fossil. 



10. Cellepora megastoma. Incrustations irregu- 

 lar, but not wide-spreading expansions. Cells very 

 distinct and oval, with a very large opening, and al- 

 most central. 



On the fossil bodies found in the chalk formation 

 in the vicinity of Paris. 



FOSSIL. 



11. Cellepora globulosa. Incrustations with 



