Plate 97. 



Figs. 1-16. TuTjuceUaria vielcshurgica, new species (p. 541). 



1. A restoration of the zonrium, natural size. 



2. Segment, X 10, showing prominent processes perforated by two large pores, where 



the next segment was attached. 

 3,4. Yonug zooecia, X 20, with salient peristomes. 



5. Segment with young zooecia, X 20. The peristome is hardly salient. The process 

 has two openings. 

 6, 7. A mature segment, X 20 and X 10. The frontal, peristomiale and ascopore are 

 well marked. 

 8. An old segment, X 20, in which the frontal is clearly separated from the peristomiale 

 by a small groove. Two processes with 4 pores for union of the segments are 

 visible. The peristomie is much thickened. 

 9. Broken segment showing the transverse section, X 20. 



10. Extremity of a segment, X 20. 



11. Base of an adult segment, X 20. 



12. A segment, X 20, exhibiting the unusual occurrence of three pores to a process. 



13. Longitudinal section and view of the interior, X 20. The thin basal olocyst has 



small perforations which give rise to the wide tubules. 



14. An old segment, X 20, exhibiting large frontal pores and well developed ascopores. 



15. An old branching segment without process, X 20, with very thick peristome and 



zooecia deformed by calcification. 

 16.- Tangential thin section, X 100, showing the tremopores separated by a network. 

 Vicksburgian (Glendon member of Marianna limestone) : West bank of Conecuh 

 Kiver, Escambia County, Alabama. 

 Cat. No. 64314, U.S.N.M. 

 Figs. 17-21. Mcniscopora eUiptica, new species (p. 556). 



17. Several fi-agments of the bifoliate zoarium, natural size. 



18. A young example, X 20. The areolae and frontal pores are quite visible. 



19. Surface of an older zoarium, X 20. The peristomes are thick and the frontal pores 



are well developed. 



20. Surface of zooecia, X 20, with a pointed avicularium in the vicinity of the peristomlce. 



21. Interior of frontal, X 20, Illustrating the true form of the apertura and zooecium. 

 Vicksburgian (Byram marl) : One-fourth mile west of Woodward, Wayne County, 



Mississippi. 



Cat. Xo. 64515, TJ.S.N.JI. 



98 



