Plate 15. 

 Fics. 1-10. OcheloseVa Jncl-xonica Cami and Bassler, 1017 (p. 452 i. 



1. .Simple and bifnrcated fragments of tlie free cylindrical zoarium. natnral size. 



2. Four specimens, natural size, showing anastomosis of the branches. 



3. A small fragment. X 20. with the ovieell preserved on one zooecium. 

 4, .0. Fragments of young zoaria, X 20, with well-developed muero. 



C. A young branch, X 20, showing no separating thread between the zooecia. 

 7. More mature example, X 20. A prominent ridge separates the zooecia. 

 S. Zooecia in a more advanced stage, X 20, where the pleurocyst covers the frontal. 

 9. Zooecia, X 20, with well-developed areolae, around which the pleurocyst has been 

 deposited. The uppermost zooecium bears an avicularium. 



10. An example, X 20, with several ovicelled zooecia. The pleurocyst covers the ovicells. 

 Middle Jacksonian fCastle Hayne limestone) : Wilmington, North Carolina 



Cat. No. 62.599, U.S.N.M. 

 FifiS. 11-19. Adeoiiclloijsis transversa, new species (p. .^Ol). 



11. Fragments of the free bilamellar zoariiini. natural size. 



12. Fragment, X 20. exhibiting gonoecia. distinguished by their larger size and by having 



three ascopores situated in a triangular cavity of the frontal. 



13. View of the interior of the zooecia, X 20. The apertura, ascopore, and areolae are 



illustrated. 



14. Tangential thin section, X 20. showing union of occasional areolae to form adventi- 



tious avicularia. 



15. Several zooecia of a tangential thin section, X 100. The triangular opening below 



the apertura is the median avicularium. Below this is the a.scopore. 

 Lower Jacksonian (Moodys marl) : Jackson, MLssissippi. 

 Cat. No. 63S54, U.S.N.M. 



16. Zooecia, X 20. with the peristomial avicularia visible and salient. 



17. Another fragment, X 20, in which the peristomial avicularia are imbedded and 



invisible. 

 IS. .Surface, X 20, exhibiting zooecia with the peristonjial avicularia inibeilded, the 

 adventitious avicularia visible, the ascopore opening near the peristomie and 

 two adventitious avicularia. 



19. An example. X 20. in which the ascopore opens frequently into the peristomie. 

 Claibornian (Gosi»rt sand) : 1 mile southwest of Rockville, Al.ibama. 



Cat. No. 63855, U.S.N.M. 

 Figs. 20-26. Adeonellopsis qnisen'berryac. new species (p. 566). 



20. The free bilamellar zoarium, natural size. 



21. Portion of a young zoarium, X 20. The cribriform area contained but one pore. 



22. An old example, X 20, showing the salient adventitious avicularium. 

 Lower Jacksonian (Jloodys marl) : Jackson, Mississippi. 



Cat. No. 63856, U.S.N.M. 



23. View of the basal zooecia. X 20. covere<l v.-ith a thick calcareous deposit. The avicu- 



larium is visible at the bottom of the total area. 



24. Transverse section of a zoarium, X 20, shQwing the thick walls. 



25. A fragment, X 20. exhibiting old zooecia with the avicularium no longer visible. 



26. Interior of zooecia, X 20. The cribriform area has five to seven pores. 



Claibornian (Gosport sand) : 1 mile southwest of Rockville, Alabama. 

 Cat. No. 63857, U.S.N.M. 

 16 



