Plate 3. 



Kli;. 1. I'liriiiiiiii ji'iiricclJii. iipw siieeU'S (|i. MM. 



The iucrustiug zoai-ium. X 20. slmwiiig zixiccial stnictnre. 

 Miihvayau (Clayton limestone) : Rnin(li<l.i;t'. Alabama. 

 Cat. No. (;37S7. r..S.X.M. 

 Fig. 2. Coikiiickiii ontiitum, new species (p. STi. 



Surface of the bilamellar tyiie-specimen. X I'O. The ornamentation of the sni-face 



and the irregular iuteropesial cavities are evident. 

 Midwayau (Clayton limestone) : Mabelvale, near Little Itock, Arkansas. 

 Cat. No. 637SS, U.S.X.M. 

 FiiiS. 3-S. Coiiiiiirinii damicornis. new species (p. 87). 



3. Three examples of the free, narrow, bilamellar, bifurcating zoarium, natural size. 



4. Zoarial surface. X 20, showing the distinct, irregular zooecia and the very irregular 



iuteropesial cavities. 



5. Transversal thin section of a frond, X 20. 



6. Tangential thin section. X 20, showing the oi)esial denticles. 



7. Medi.in thin section. X 20, obtained by rul)bin,g away both sides of the fronds. 



8. Longitudinal thlu section, X 20, showing the structure of the bilamellar zoarium. 

 Slidwayan (Clayton limestone) : Owl creek. 2J miles northi>ast of Ripley. Jlississippi. 



Cit. Xo. G.3780, r.S.X.M. 

 Kios. 11,10. Miiiilirdiiii/iDiiiii rditdlifcni. new sj^ecies (Ji. !).">). 



0. Surface of the incrusting zo;irium, X 20, distinctly exiiibiling the canal of the 

 mural rim. 



10. Another jiortion of the same /oarium, X 2o. with one <';ilcitied zooecium having 



a small linear orilice. 

 Midwa.van (Clayton limestone) : 1 mile west of I'ort Gaines, Georgia. 

 Cat. Xo. 63790. U.S.X.M. 

 l''i(;.s. 11-13. MciiihifiKlocriiiiii tnni'<rcrxiiii'. new species (i'. 120). 



11. The incrusting znarinm. >' 3K exhibiting lite trian.gul;ir avicularia, transversely 



arianged. 



12. Another zoarium, X 20, illustrating the aspect in tlie vicinity of the ancestrula 



where re.generateil zooecia and calcitied zixiecia are developed. 



13. A variation. X 20. with the opesium strongly denticulated 

 Jliilw.-iyan (Clayton limestone) : 1 unle west of Fort (iaines, Georgia. 



Cat. Xo. 6.3701. F.S.X.M. 

 Fig. 14. ('(iVojioni ? tiiheromi. new species (p. l."i.">). 

 The free unilamellar type-specimen, X 20. 



Midwayau (Clayton limestone) : 1 mile west of Fort Gaines. Georgia. 

 Cat. Xo. G3702, f.S.X.M. 

 Fig. 1,"i. I'dlldiiuKi ihiidcriUi Audouiu, 1X26 (p. 14S). 



All Eocene examiile of this widely distributed species, X 20. 

 Jlidway.an (Clayton limestone) : Kruudidge, Alabama. 

 Cal. Xo. 63703, C.S.X.JL 

 Fig. Hi. Cdllhiiiiid tsc-vspiiiosd. new species (ji. 147). 



The incrusting tyiie-specimeu. X 20, with o\icells and the characteristic six spines 



well develQped. 

 Jlidwayaii (Claylon limestone): Hrundidge, .\labama. 

 Cat. Xo. 63704. F.S.X.M. 



