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PAGE 



Figs. 1, 2. FISTULIPORA MACULOSA (Hall) 262 



1. A complete zoarium, natural size, showing the characteristic 



maculae. 



2. Surface of a zoarium magnified. 



New Scotland formation, New York. 



Figs. 3-5. SEMICOSCINIUM CORONIS (Hall) 285 



3. A fragment, natural size. 



4. An enlargement of the non-celluliferous face. 



5. Celluliferous face enlarged, showing the characteristic, expanded 



carina. 

 New Scotland formation, New York. 



Figs. 6-8. FENESTELLA PHJLIA Hall 281 



6, 7. A fragment showing the non-celluliferous face, X 1, and an 

 enlargement of the same. 



8. Enlargement of the celluliferous side. 



New Scotland formation, New York. 



Figs. 9-11. POLYPORA COMPACTA ( Hall) 284 



9. A fragment, natural size. 



10, 11. Enlargements of the non-celluliferous and celluliferous faces 

 of this species. 

 New Scotland formation, New York. 



Figs. 12-14. STICTOPORA ? PAPILLOSA Hall 289 



12. Fragments, natural size. 



13-14. Surface of specimen, X 6 and X 18. 



New Scotland formation, New York. 



Figs. 15-17. ORTHOPORA REGULARIS (Hall) 287 



15. A specimen showing a rectangular mode of branching, X 1. 

 16, 17. Surfaces of two specimens, X 6, showing variations in the 

 thickness of the zocecial walls. 



New Scotland formation, New York. 



Fig. 18. ORTHOPORA RHOMBIFERA (Hall) 286 



Enlargement of a specimen showing arrangement and form of the 

 zofficial apertures. New Scotland formation, New York. 



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