Platk 12. 



Figs. 1,2. 0«ione»o JHCcaniei, new species (p. 106). ^ „ « „.„ 



I The discoidal zoarium, X 20. The nucestrula is seeu below the center of the hguie. 

 •>■ luuer side of the same. X 20, exhibiting the large pores of the radial lines of zooeeia. 



Lower Jacksonian : 3i miles southeast of Shell Bluff post office, Georgia. 

 Cat. No. 03830, U.S.N.M. 

 Figs. 3.4. LunuUuia giaiuUiioni, new species (p. 242). 



3. The fragmentary type specimen, X 20. Some of the /.ooec.a are provided with ^^ell- 



deflned ovicells. . . 



4 Inner side of the same example. X 20. illustrating the large tuberosities. 

 ■ Claibornian (Lisbon formation) : Wautubbee Hills, 4 miles south of Enterprise, 

 Mississippi. 



Cat. No. 63840, U.S.N.M. 

 Figs. 5-15. OtioncVa tnberosii. new species (p. lOT). 



5. Three examples of the discoidal zoarium, natural size. 



6. Tangential thin section through the inner side, X 25. 



-' Tangential thin section through the eelluliferous side, X 20. 



8 Zooeeia and avicularia of an average example, X 20. , . , , 



9 Section of a zoarium between the zooeeia. X 20. Tlie innor si<le is tli„k anl 



fibrous and narrow tubules may be noted between the tuberosities. 

 10. Inner side of a zoarium, X 20. The discoidal form results from special budding 

 along lateral lines. 



II Surface X 20, of an example with unusually large vibracula. 



12! Inner side of a zoarium, X 20. Both tuberose and smooth conditions of the rows are 



13. TrngmUal thin section, X 100. The mural rim is seen to be composed of radially 



arranged olocystal elements. 



14. Inner side of a fragment, X 20, showing small pores perforating the rows without 



tuberosities. 

 15 Portion of a zoarium. X 20, with large auriculated vibracula. 

 Lower Jacksonian (Moodys marl) : Jackson, Mississippi. 

 Cat. No. 63841, IT.S.N.M. 



