Plate ?,:1. 



Figs. 1-5. Liiiiiihuin ii.iitiiimi I.diisiliilc lNir> (ji. 2-17). 



1. View of tlie zoarimii. iintural size, preserving oul.v tlie liasal lamina. 



2. A life-sized view of the interior of the zoarium as preserved in tbe rock. 



3. Celluliferoiis side of au example, X 20, showing both small and large zooecia. 



4. Interior of a zoarium. X 20, illustrating the sacklike form of th!> zooecia, which are 



moreover calcified. 



5. Edge of a zoarium. showing the calcified zooecia in transverse fracture. 

 Middle Jacksonian (Castle Hayue limestone) : Wilmington. Xorth Carolina. 



Cat. No. 63990, TJ.S.N.M. 

 Figs. G, 7. Rlmganostrimit lerii/dl iiiii, new species (p. 25i). 



6. Surface of the iucrusting zoarium, X 20. with numerous ovicells developed. 

 Middle Jacksouiau (Castle Hayne lime.stone) : Wilmington, North Carolina. 



Cat. No. 64000. U.S.N.M. 



7. Surface of zooecia. X 20, of the Vicksburgiau form. 



Vieksburgian (Marianna limestone) : Salt Mountain, five miles south of Jackson, 

 Alabama. 



Cat. No. 64001, U.S.N.M. 

 Fig. 8. Rhat/iixaxtoiiiu iiiijiKsciiliiiii. new species (p. 255 i. 



The t.vpe-speeimen of this minute incrusting species, X 20. 

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

 Cat. No. 64002, U.S.N.M. 

 Figs. 9-16. Stcnaiioiiorrlln jnvksoiiicd. new species (p. 262 i. 

 9. Three of the bilamellar zoaria, natural size. 



10. Surface, X 20, exhibiting the large (B) zooecia and the small (a) zooecia. 



11. Another zoarium, X 20. 



12. Photograph of interior. X 20, after abrasion of the dorsal side. 



13. View, X 20, showing oblique partition in the a zooecia obtained by abrasion of the 



frontal. 



14. Tangential thin section through zooecia, X 100. 



Middle Jacksonian: Baldoek, Barnwell County, South Carolina. 

 Cat. No. 64003, U.S.N.M. 



15. Dorsal side of a zoarium, X 20, which has parted through the juiddle. 

 Middle Jacksonian : Seventeen miles northeast of Hawkinsville, Georgia. 



Cat. No. 64004, U.S.N.M. 



16. Surface of a broad zoarium, X 20. 



Middle Jacksonian : Three and a half miles north of Orovania, Georgia. 

 Cat. No. 64005, U.S.N.M. 

 40 



