Plate 13. 



Figs. 1-S. Memhieiidoecium rectum, new species (p. 122). 



1. Tlie inei-usting zoai-ium of this species, X 20, .somewliat abraded and sliowing tbe 



five distill dietellae. Tlie eiidozooecial ovieell (limken) is present on a number of 

 zooecia. 



2. A zoarium of normal zooecia only, X 20. two of wbich exhibit tbe small endozooecial 



ovieell distinctly. 



3. Portion of a ratber broad example, X 20. exhibiting tbe aneestrnlar region with 



closed zooecia and an outer area of normal zooecia. Tbe closed zooecia often 

 bear the imprint of tbe opercular valve. 



4. A specimen, X 20, with broad, closed and normal zooecia. 



.5. Aneestrula and surrounding closed zooecia perforated by a pore. X 20. 

 Yicksburgiau ( Byram marl) : Hyram, Mississippi. 

 Cat. No. 63842, U.S.N.M. 



6. Elongate normal zooecia, X 20. 



Vieksburgian {"Chimney rock'' of Marianna lin\estone) : 1 mile north of Monroe- 

 ville, Alabama. 



Cat. No. 63965, U.S.N.M. 



7. A small zoarium. X 20, with a regenerated zooecium just below the ovicelled one. 

 Lower Jacksonian: 3J miles southeast of Shell BlufE post office, Georgia. 



Cat. No. 6.SS43, U.S.N.M. 



5. Tbe usual .Jacksonian form of the species. X 20. 



Middle Jacksonian (Castle Hayue limestone) : Wihuingtou. North Carolina. 

 . Cat. No. 03844, U.S.N.M. 

 Fig. 9. Coiwpeum lacrolrii Busk, 1852 (p. 89). 



The incrustiug zoarium of this widely distril>nted sjiecies, X 20. 

 Claiboruian (.Gosport sand) : Claiborne. Alabama. 

 Cat. No. 63845. U.S.N.M. 

 Figs. 10-12. Liiniilaiia Iwuhita. new species (p. 243). 



10. Celluliferous surface of a zoarium. X 20. showing the tongue-like process of tlie 



hydrostatic zooecia. 



11. View of another zoarium, X 20, illustrating the rectangular nornuil zooecia and 



tbe fusiform vibracula. 



12. Inner side oj a zoarium, X 20. showing the perforated convex radial ribs. 

 Lower Jacksonian ( Moodys marl): Jackson. Mississippi. 



Cat. No. 63846, U.S.N.M. 

 Figs. 13-15. Lunularia chiiboriiica, new species (p. 248i. 



13. Inner side of a fragmentary zoarium, X 20, showing con\ex rows pierced by pores. 



14. A transverse fracture between the zooecia, X 20. 



15. Celluliferous side of zoarium, X 20. exhibiting occurrence of normal zooecia only 



and arrangement of vibracula. 

 Claiborniau (Gosport sand) : Claiborne. Alabama. 

 Cat. No. 63847. U.S.N.M. 

 Fig. 10. ileiiihntiiiiwriiia hi.iii Reuss, 1869 (p. 96). 



Portion of tlie incrustiug zoarium, X 20. of tbe American Eocene specimen referred 



to this species. One zooecium exhibits total regeneration. 

 Claiborniau (Gosport sand) : 1 mile southwest of Rockvllle, Clarke County, Alabama. 

 Cat. No. 63848. U.S.N.M. 

 14 



