Plate 59. 



Figs. l-O. Sniittiiia (iruiulifonsn, new species (p. 460). 



1. .Surface of the plurilamellar incrustiiig zoarium, X 20. The thread separating the 



zooecia is scarcely visible. Avicnlaria are absent. 



2. Irregularly arranged zooecia, X 20. The lyrula is visible in some of them. 



3. Ovicelled zooecia. X 20. The areolae are in double or triple rows in the lower 



part of the zooecia. 



4. Ordinary zooecia, X 20, in which the separating thread is quite thick. 



5. Sketch of the apertura and the lyrula. 



6. Interior of zooecia, X 20, showing lyrula. 



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

 Cat. No. G4124, U.S.N.M. 

 Figs. 7-10. SiiiHtina luhintiiln, new species (p. 460). 



7. The free, cylindrical zoarium. X 20. The areolae are small. 



8. A normal zoarium, X 20, exhibiting the characteristic salient lips nf the peristomice. 



9. Basal portion of a zoarium, X 20, showing large areolae. 

 10. Vertical section, X 20, through an ovicelled zooecium. 



ap, apertura; av, avicnlaria n armature; or, ovicell : pic. peristomice; c, zooecium. 

 Middle Jacksonian fCastle Hayne limestone) : Wilmington, North Carolina. 

 Cat. No. G4125, U.S.N.M. 

 Fig. 11. f<iiiiHiii(i corovntn, new siiecies (p. 461). 



The unilamellar zoarium, X 20. The ovicells have a i)orous area surrounded by a 



collar. The pleurocyst is granulated. 

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

 Cat. No. 64126, U.S.N.M. 

 Figs. 12-14. SiiiHtina stnniihccki Reuss, 1866 (p. 46.3). 



12. The incrusting zoarium, X 20, showing ovicelled zooecia. 



Middle .Jacksonian: Eighteen miles west of Wrightsville, Georgia. 

 Cat. No. 64127, U.S.N.M. 

 1.3. Ordinary and ovicelled zooecia, X 20, ornamented by a porous area. The small 

 areolae and median avicularium are visible. 

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

 County, Georgia. 

 Cat. No. 64128, U.S.N.M. 



14. Ordinary zooecia, X 20. separated by a salient thread. 



Upper Jacksonian (Ocala limestone) ; One and one-halt' miles alxive Bainbridge, 

 Georgia. 



Cat. No. 64129, U.S.N.M. 

 Figs. 15, 16. Siniltina sordida, new species (p. 465). 



15. The incrusting zoarium, X 20, witli both ovicelled and ordinary zooecia. Both the 



small triangular oral avicularium and the round salient frontal avicularium are 

 developed. The lyrula is visible frequently. 



16. Another portion of the same zoarium, X 20. 



Upper Jacksonian (Ocala limestone) : (jne and one-half miles above Bninbridge, 

 Georgia. 

 Cat. No. 64130. U.S.N.M. 

 Figs. 17-10. ^)iiittii)a crigiia. new species (p. 463). 



17. Surface of the free bilamellar zoarium, X 20. Two closed zooecia are present. 

 Upper Jacksonian (Ocala limestone) ; One and one-half miles southeast of Georgia 



Kaolin Co.'s mine, Twiggs County. Georgia. 

 Cat. No. 64131, U.S.N.M. 



18. Anotlier zoarium with the pleurocyst well develoiied, X 20. A number of the zooecia 



are closed. 



19. View of the interior. X 20. 



Middle Jacksonian : Three and one-half miles west of Grovania, Georgia. 

 Cat. No. 64132, U.S.N.M. 

 60 



