Plate 71. 



Figs. 1-9. TuhiiceUa r/ihhosa, new .species (p. .548). 



1. Tlie bilamellar, dicliotomously brauched zoariimi. natural size. 

 2,3. Two fragments. X 10, illustrating the gibbosities of tbe surfaces fornieil liy tbe 

 development of tbe tubules about tbe peristomie. 



4. A portion of figure 2, X 20, showing structure in more detail. Tbe ascoiiore is 



small and not easily distinguished from the frontal pores. 



5. Isolated gibbosity of a branch, X 20, with the peristomies much enlarged liy the 



growth of the tubules. 

 6, 7. Two longitudinal sections, X 20, exhibiting the internal structure. The tremocyst 

 is very thick but sometimes thin. 

 S. Transverse section, X 20. of a fragment with nodosities. 



9. Longitudinal section, X 20, showing that the nodosities of the surface are caused 

 by the increased growth of the tubules. 

 Middle Jacksonian : Xear Lenuds Ferry, .South Carolina. 

 Cat. Xo. 641S7, U.S.N.M. 

 Figs. 10-12. BiarehriOiiia aculcutu. new .species (p. nfiS"). 



10. Fragments of the free bilamellar zoarium. natural size. 



11. Zooecia. X 20. with interareolar costules well developed. 



12. Another surface, X 20, The median position of the avicularium is evident. 

 Middle Jacksonian : 34 miles south of Perry, Georgia. 



Cat. No, 64188, U.S.N.M. 

 Figs. 1.3-23. BracehricJgia polymorplia contulnta, new variety (p. oSOl. 



13. Fragments of the bilamellar zoarium, natural size. 



14. An example, X 20, exhibiting gonoecia which are larger than the or.liiiary zooecia. 



The lamella is seen. 

 1.5. An aspect of the zooecia, X 20. 



IG. Interior of zooecia. X 20. The areolae are quite visible. 

 17. Another fragment, X 20, exhibiting transverse avicularia. 



15. Aspect of zooecia, X 20, in which the characters are changed by fossilization. 

 Middle Jacksonian : One-half mile southeast of Georgia Kaolin Co.'s mine. Twiggs 



County, Georgia. 



Cat. No. 64189, U.S.N.M. 



19. Ordinary zooecia, X 20, with prominent avicularia deforming the aperture. 



20. Zooecia, X 20, with transverse, curved avicularia. 



21. Zooecia, X 20, showing the very salient avicularia, 



22. A fragment exhibiting gonoecia, X 20. The aviculariiim is oblique and deforms 



the apertura. 



23. Zooecia of a polymorphic fragment, X 20, with large obli(iue avicularium. 

 Middle Jacksonian : 18 miles west of Wrightsville, Georgia. 



Cat. No. 64190, U.S.N.M. 

 Figs. 24-2G. PhylacteUa inftitulilinlum Cauu and P.assler, 1017 (p. 574). 



24. Ordinary zooecia of the incrusting zoarium. X 20. The small pores and granules 



of the surface and the tubular peristome witli its distal tongue are illustrated 

 25, 26. Two fragments, X 20, each bearing an ovicelled zooecium. 



Middle Jacksonian (Castle Hayne limestone) : AYilmington, North Carolina, 

 Cat. No. 62607, U.S.N.M. 

 Fig. 27. PlniUictcUii purriceUa, new species (p. 575). 



The incrusting zoarium, X 20, illustrating the small size of the zooecia 

 Middle Jacksonian: Baldock, Barnwell County, South Carolina. 

 Cat. No. G4191, U.S.N.M. 



