Plate 93. 



Figs. 1-0. Sinittina U'hin), now species (p. 46S). 



1. Group of tile free, cylindrical, hollow zoaria, ualuial size. 



2. A zoarium, X 20, showing the salient lips of the peristome. 



3. Another zoarium, X 20, in which these lips are wanting and the zooeeia are sepa- 



rated by thick walls. The avlcularla are small. 



4. Zooeeia, X 20, with large median avicularia and several brnlcen ovicells. 



5. Another aspect of the zooecial surface, X 20, with large oral tubercles. 

 G. Ovicelled zooeeia, X 20, with enormous avicularia. 



7. Another specimen with ovicelled zooeeia, X 20. The ovicells are granulosa. 



8. Interior of the frontal, X 20, showing the olocyst perforated by areolae. 



9. Tangential thin .section through the frontal of a zooecium. X 100. 



Vlck.sburgian ("Chimney rock" of Marianna limestone) : One mile north of Monroe- 

 ville, Alabama. 



Cat. No. 64290, U.S.N.M. 

 Figs. 10-lG. Smitlina fiiiiiiht. new species (p. 466). 



10. Several fragments of the bilamellar zoarium, natural size. 



11. Several zooeeia, X 25, with spines, avicularia, and lyrule. 



12. Another zoarium, X 20, with several ovicelled zoowMa, the ovicells broken. 



13. Surface of a zoarium, X 20, showing zooeeia w^ith lyrula, small, salient, oral avicu- 



larium and large lateral avicularlum with spatulate beaks. 



14. Interior of the frontal. X 20, illustrating the structure of the olocyst and pleurocyst. 



15. Zooeeia, X 20, one preserving a carinated ovicell. 



16. Vertical section, X 20, illustrating the apertura oblique on the zooecial plane. 



ap, apertura: in. mucro: pic, peristomice; x, zooecium. 

 Vicksburgian (Marianna limestone) : Salt Mountain, 5 miles south of Jackson, 

 Alabama. 



Cat. No. 64300, U.S.N.M. 

 Figs. 17-20. I'oreUa crecta. new .species (p. 401). 



17. Several fragments of the free bilamellar zoarium, natural size. 



18. A frond, X 20, exhibiting the very salient umbo. 



19. Another specimen, X 20, with an ovicelled zooecium. 



20. An unusually broad frond. X 20. The umbo is broken and leaves a cicatrix. 

 Vicksburgian ( Red Bluff member) : Seven and oue-Ualf miles .southwest from Bladen 



Springs. Alabama. 



Cat. No. 04301, C.S.N.M. 



94 



