Plate 108. 



Fros. 1-15. Mecynoecia proloscidca Milue-Edwards, 1S3S (p. 726). 

 1. A group of fragments, natural size. 

 2-4. Tliree well preserved specimens, X 12, sliowing variations. 



Vifkslnirgian (.Marianna limestone) ; West bank Conecali Kiver, Esrambia County, 

 Alabama. 



Cat. No. 6.^437, U.S.N.M. 

 5-8. Four similar .specimens, X 12, from the .Tacksonian. 

 9-11. Three tran.sver.se .section, X 12, taken at dilfereut heights from the same specimen. 

 12, 13. Two transverse sections, X 25. 

 14. Longitudinal thin section, X 12. 

 1."). Longitudinal thin section. X 12, of a .specimen with thick walls. 



Middle .Tacksonian (Castle Hayne limestone) : Wilmington, North Carolina . 

 Cat. .No. G.J4.3S, U.S.N.M. 

 Fig. IC. Entulophnra Htipatu, new species (p. 734). 



The cylindrical clubshaped zoarium, X 12. 



Midwayan (Clayton limestone) : Jlabelvale, near Little Rock, Arkansa.s. 

 Cat. No. 65439, U.S.N.M. 

 Figs. 17-25. AscoKoecia prominetu, new species (p. 8oG). 



17, IS. The solid branching zoarium, natural size, and two specimens, X 3. 



19, 20. Surface of a branch with salient peristome, X 12 and X 2.5. 



21, 22. Tran.sverse and longitudinal thin sections, X 25. The me.sopores are as wide as the 



tubes. 

 23, 24. Tangential thin section, X 25, and a small portion, X 100. 

 25. Fragment, X 12, exhibiting three ovicells. 



Midwayan (Clayton limestone) : Mabelvale, near Little Itoek, Arkansas. 

 Cat. No. G5440, U.S.N.M. 



109 



