Plate 127. 



Figs. 1-7. Mccyiwccia cyliiuli iai, new speoies (p. 727 l. 



1. Fragments of the cylindrical bifurcated zoarium. natural size. 



2. Ovicelled specimen, X 12. Tlie oeciostome is elliptical. 



3. Specimen witli broken ovicell, X 12, showing its formation anterior to the calcifica- 



tion of the adjacent tubes which are altered and disarranged. 



4. Normal example, X 12. The zone of growth is small ; the tubes are margined. 



5. Surface of the same, X 25. 



G. Remarkable specimen, X 12, showing the extraordinar.v variations in the distance of 



tlie peristomes. 

 7. Longitudinal thin section, X 25. 



Middle Jacksonian (Castle Hayne limestone! : Wilmington, North Carolina. 

 Cat. No. 65-165, U.S.N.M. 

 Figs. S-IS. Mecynoeoia hrcvis, new species (p. 728 ». 

 S. Branches, natural size. 

 9. Branch with short ovicell, X 12. The zone of growth is little prominent and rounded. 



10. Other side of the same specimen, X 12. 



11. Interior of the ovicell showing the disarrangement of tlie tubes caused by the anterior 



formation of the ovicell. 



12. Branch with short ovicell, X 12. 



Jacksonian (Zeuglodon zone) : Sliulnitu, Mississippi.' 

 Cat. No. 65466, U.S.N.M. 

 13, 14. A compressed fragment with salient peristomes and the zone of growth visible, 

 X 12 and X 25. 

 Middle Jacksonian, IS miles west of Wrightsville, Georgia. 

 Cat. No. 65467, U.S.N.M. 

 15, 16. Fragment with the tubes arranged in transverse rows, X 12 and X 25. 

 Jacksonian (Zeuglodon zone) : Suck Creek. Clark County, Mississippi. 

 Cat. No. 6546S, U.S.N.M. 

 17, 18. Much compressed fragment branching irregularly, X 12 and X 25. 

 Middle Jacksonian : Rich Hill, Crawford County, Georgia. 

 Cat. No. 65469, U.S.N.M. 

 Figs. 19-22. Mecijnoecia pusilla, new si)ecies (p. 72-*<i. 

 19, 20. The small zoarium, X 12 and X 2.5. 



Middle Jacksonian: Near Lenuds Ferry. South Carolina. 

 Cat. No. 65470, U.S.N.M. 



21. Another fragment, X 12. 



22. Specimen, X 12, showing the large ovicell. 



Middle Jacksonian : Three and one-half miles north of Grovania, Georgia. 

 Cat. No. 65471, U.S.N.M. 

 128 



