PLEIOCENE FOSSILS. 15 



This beautiful fossil is found on the surface of submarine bodies, like circular spots of 

 delicate, radiating lace-work. The walls of the cells are slightly raised at the distal ex- 

 tremity, so as to form small hoods, the only -covering of the cells. 



The genus Membranipora is found in the lower cretaceous beds, has its maximum in the 

 upper portion of the same formation, and is living in every sea. 



Plate IV., Tig. 10. Cells magnified. 



Locality. Smith's, Goose Creek. 



Museum, College of Charleston. 



REPTOCELLEPORAKEA.— D'Orb. 

 REPTOCELLEPORARIA LNFORMATA. 



Plate IV., Fig. 11 and 12. 



Cellepora informata, Lons., Quar. Joiir. Geo. Soc, London, Vol. I., p. 505. 



R. incrustans, subglobosa vel mamillosa, porosa; cellulis, inequalibus • ore rotundo vel 

 ovato ; margine elato, incrassato. 



Description. Incrusting, irregular, subglobose, or with the surface mamillary, porous ; 

 cells unequal ; mouth circular, raised, thickened. 



This fossil occurs in irregular verrucose masses, composed of numerous layers of cells, 

 and incrusting shells and other marine substances. The masses are often six inches in 

 diameter. The densely porous surface and greater regularity of the cells, distinguishes 

 this from the following species. 



Plate IV„ Fig. 11. Coral, natural size. 

 " 12. Cells magnified. 



Locality. Darlington District. 



Museum, College of Charleston. 



The fossil species of this genus are found as low as the upper cretaceous formation, and 

 extend through the Tertiary. The living forms exist in the seas of warm, temperate, and 

 cold climates. 



