Plate 67. 

 Fig. 1. Tcssara.fJoiiKi onuitu. new species (p. 521). 



Celluliferous side of the free, compressed zoarium. X 20. The frontal is smooth 

 and has areolae. The peristome bears two small avicularia, and the frontal also 

 has a few simple avicularia in addition to the spiramen. 

 Middle Jaclisonian (Castle Ha.vne limestone) : Wilmington. North Carolina 

 Cat. No. G4170. U.S.N.M. 

 Figs. 2, 3. Tcxsciradoiiici (/nnidipoid, new species (\i. 522). 



2. The free, compressed branching zoarinm, X 20. The wide peristome and the spira- 



men opening, close to the peristomie, are shown. 



3. Dorsal side of another example, X 20. Tlje dorsal is a tremocyst and bears a median 



row of avicularia. 



Upper Jacksonian (Ocala limestone) : West bank Sepnlga River, Ewambia County. 

 Alabama. 



Cat. No. 64171, U.S.N.M. 

 Figs. 4-2.3. Trcmotoichos rectifurcatum Cann and Bassler. 1017 (p. 523). 



4. Three fragments of the free, siibcylindrieal zoarinm, natural size. 



5. A young specimen, X 20, showing the tliiu peristome with avicularium, the tremoeystal 



frontal and the spiramen to the right or left of the median axis. 

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

 Cat. No. 62606, U.S.N.M. 

 6, 7. Celluliferous side of two fragments, X 20. The spiramen is not always visil,le and 

 the peristome often bears two avicularia. 

 Upper Jacksonian (Ocala limestone) : Chipola River, east of JInrianna Florida 

 Cat. No. 64172, U.S.N.M. 



8. A young example, X 20, in which the spiramen is not plainly visible. 



9. Two fragments, natural .size, of much branched zoaria. 



10. Dorsal of an old example, X 20. The branches are close together 



11. Celluliferous side of another old example, X 20. The .spiramen is lost among the 



.sulci, and the peristomie is often obscured. 



12. Portion of a mature specimen, X 20, showing another aspect of the species. The 



spiramen is not apparent. 

 13.14,15. Transversal sections, X 20, exhibiting thickness of the outer walls. 



16. Schematic drawing of a vertical section. 



OIK apertura ; pe, peristome ; pi, peristomie ; pic. peristomice ; sp, spiramen : th. lul.ule • 

 //•. tremocyst: ~, zooecium. 



17. Vertical thin section, X 20, showing that the tubules of the tremocvst are confused 

 IS. A lew of zoarium, after frontal has been abraded, X 20. The line Inm) is shown .-iNo 



in flg. 15. 



19. Vertical section, X 20. The zooecia communicate by septulae is). 



20. Interior of zooecia, X 20. No pores ou the zooecial front are apparent. 

 21, 22. Dorsal of young specimens, X 20. 



23. Lateral view, X 20, sliowing transverse section of a side branch. 



Middle Jacksonian (Castle Hayne limestone) : Wilmington. North C-irolina 

 Cat. No. 02G00, U.S.N.M. 

 68 



