Plate 84. 



Figs. 1-7. Stcninidiiorcllu rk-kKhuii/iid. new spoi-ies (]i. 2'M). 



1. Surface of tho bifoliate zo.-irinm. X 20, illiistratiiig characters of the smaller a 



zooecia with iniiiroiiiineiit pol.vpidinn tube and oiiesiiiles ami of the larger B 

 zooecia iu which poljpidiau tube is quite iironiinent. 



2. Another view of the surface, X 20. 



3. 4. Two fragments, X 20 ,witli the zoarial surface rubbed away to show the remains 

 of the pol.vpide tube at different levels. 

 5. Preparation, X 20, obtained by gentle rubbing away the surface of the zoarium, tlins 



exhibiting the complete polypide tube. 

 0. Microstructure of the mural rim, X 100. The elements of the olyeyst composing 

 the rim are grouped iu radial rows .-ibout the opesiura. 



7. Two fragmentary zoaria, natural size. 



Vicksbnrgian (Glendon member of Marianua limestone) : West bank of Conecuh 

 Eiver, Escambia County, Alabama. 

 Cat. No. 64257, U.s.N.M. 

 Figs. S-13. MciiihranlporcUa f siilxifjaxsi-i, new species (p. 280). 



8. A group of zoaria. natural size. 



9. Portion of zoarium, X 20, showing the arch above the afierture of the ovicelled 



zooecia. 



10. Zoarium, X 20. with both ovicelled aud nonovicelled zooecia. The structure of the 



h.vperstoniial ovicell is illustrated. 



11. Fragment of an old zoarium, X 20, with the cribriform areas separated liy a thick 



mural rim. 



12. Zooecia, X 20, in which the small lacuna is not present. The avicnlaria are ver.v 



salient and the upper zooecium has a calcareous operculum. 



13. Zoariuiu. X 20, composed of zooecia without ovicells. 



Vicksbnrgian ("Chimney rock" of Marianna limestone) : One mile north of Monroe- 

 ville, Alabama. 



Oat. Xo. 04258, U.S.X.JI. 

 Fig. 14. PuelJUni simnUtlor. new species (see also pi. 41, fig. 21 ( (p. 29S'i. 



Surface of the incrusting zoarium, X 25, showing the two oral aviculari;i to each 



ovicelled zooecium. 

 Vieksburgian (Marianna limestonel : Near Cl.iiborne. Monroe County. Alabama. 

 Cat. No. 64259, U.S.N.M. 

 Fig. 15. I'lirlliiin inarmatn, new species (p. 2901. 



The incrusting zoarium. X 25. showing the absence of avieiilaria. 

 Vicksbnrgian (Jlarianna limestone) : Murder Creek east of Castlebury, Conecuh 

 County, Alabama. 



Cat. No. 64260, U.S.N.M 

 Fig. 16. Grithiiroten spcctahiUs, new six-cies (p. 303). 



The incrusting zoarium of this unique species, X 20. The large irregular inter- 

 zooecial cavities, the spiramen and the two prominent oral avicularia are to be 

 noted. 

 Vicksbnrgian (By ram marl) : By ram, Mississippi. 

 Cat. No. 64261, U.S.N.M. 



85 



