112 01^ THE ASTROC(ENI^ OF THE SFTTON STOiN^E. 



ceeded longer than in the part represented in fig. 1, showing a wide 

 mural coenenchyma without a trace of the once separate walls, their 

 fusion being complete. X5. 

 Fig. 6. Corallites in transverse section, showing mural coenenchyma. X 5. 



6. The costae of adjacent corallites from a transverse section. X 12. 



7. Section of immatvire corallites. XlO. 



8. A corallite budding within the lumen, and defiormatiop of the parent. 



X5. 



9. Ornamentation of the sides of septa and the mural coenenchyma (c), 



X5. 



(Drawn from nature.) 

 (For the Discussion on this paper, see p. 142.) 



