Plate 21. 



Figs. 1-4. Cyclocolposa lenuiparietis, new species, (p. 13G.) 



1. The incrusting zoarium, X 20, with some of the zooecia lieariiig a roun<l a\'icularium. The 

 thinness of the zooeeial walls may be noted. 



2. Ovicelled zooecia, X 20, showing the ovicell deeply imbedded in the distal zooeciuni. 



3. Zooecia, X 20, exhibiting regular arrangement, the two rows of areolae and the granulated 

 pleurocyst. 



4. Interior of the zooecia, X 20, illustrating the condyles on each side of the apertura. 

 Miocene (Duplin marl): Harvey's Mills, Leon County, Florida. 



Figs. 5-9. Cydoperiella rubra, new species, (p. 137.) 



5. Surface of an incrusting lamella, X 20, with several ovicelled zooecia, .showing that the o\ic(>ll 

 entirely covers the apertura. 



6. Normal zooecia, X 20. 



7. Interior of the zooecia, X 20, illustrating the two lateral condyles on which the operculum 

 oscillates. 



Miocene (Duplin marli: Wilmington. North Carolina. 



8. Zooecia, X 20, preser\-ing a frontal gibljosity. 



Miocene (Duplin marl): 8 miles east of Snow Hill, North Carolina. 



9. A Pliocene example of this species, X 20: the zooecia are slightly less regular than in the 

 Miocene form. 



Pliocene (Waccamaw marl): Waccamaw River, Horry County, South Carolina. 

 Figs. 10-14. Aimalosia aculeata, new species, (p. 139.) 



10. The incrusting zoarium with ovicelled zooecia, X 20. 

 Miocene i Duplin marl): Harvey's Mills, Leon County, Florida. 



11. The ancestrula and surrounding zooecia, X 20. The first zooeciuni is an avicularium while 

 the other four zooecia are normal. 



Miocene (Duplin marl): Muldrow'.s Mills, South Carolina. 



12. A very irregular incrusting zoarium, X 20. 



Pliocene (Waccamaw marl): Waccamaw River, Horry County, South Carolina. 



13. Zoarium with ovicelled zooecia, X 20. The orifice of the ovicell is distinct from the apertura. 



14. Broad marginal zooecia, X 20, without ovicell. 

 Miocene (Duplin maiii: Wilmington, North Carolina. 



265 



