Plate 42. 



Fifi. ]. Di-stiiiiscicIiiirclUi jiu-lcsoiiini. new species (p. 300). 



The inci'ustiiii,' tyiie-spociiiieii, X 30. Numerous small ncccssdry cellules nrc >ii(i\vii. 

 MiiUUe Jacksouiiui : Oue-li.-ilf uiile snutlienst nf (ieciri:!:! Kaolin Co.'s Mine. Twicgs 

 County, Geori;ia. 



Cat. No. G4029, US.N.M. 

 Figs. l!. :!. (Iciilijjrntes cdnrexa. new species i ii. .'Mill). 



2. The incrusting zoanuni, X 20, with ovai-i.in nooecin, wliicli alone hoar the ovicell. 



spiranien and oral avicularia. 



3. Another example, X 20, without ovicelled zooecia. The ordinary zooecia lack the 



spiranien and oral avicularia. 

 Upper Jacksonian (Oc.-ila limestone) : West hank .Sepulya River, Escambia Cinnity, 

 Alahama. 



Cat. No. n4(i:!0, T'.S.X.M. 

 Figs. 4, .">. (IciiJiiinitcs (iu<iihis(i inlis, new s|iccios (p. :',ii-li. 



4. A fraf;meiit of a bifurcated zoariuin, X 20. The spirameu is here replaced by a. 



pseudo-riniule. 



5. The free cylindrical zoariuni. X 20. The siiiramen is present on the zooecia without 



ovicells. 

 Upper Jacksonian (Ocala limestone) : Chiiiola River, east of Mari.inna. Florida. 

 Cat. No. 64031, T'.S.N.M. 

 Figs. li. 7. Mrfnicdlpond brrris-, now species (p. 30."il. 



C. Fragment of the bifoliate zoariuin, natural size. 



7. Portion of the surface. X 20. The large, short zooecia, the smooth ovicell and the 



absence of avicularia are characteristic. 

 Middle Jacksonian: Near T.enuds Ferry, South Carolina. 

 Cat. No. 640.32, tT.S.N.M. 

 Figs. .S-13. MetrncolixiKO (iiiinilia. new species (p. oHo). 



8. Portion of the bifoliate zoarium, natural size. 



9. Surface of tlie same specimen, X 20. The long zooecia, with carinated ovicell and 



the large distal avicularia, are the distinguishiug characters. 



10. Drawing of the interior of the zooccial frontal, X 20, showing the pi-oximal border 



of the aperture bordered by a thick collar. 



11. Tangential thin section. X 25. 



12. Tangential thin section of a single zooecium, X 100. The avicularia, lacunae, traces 



of the costules and the iwl.vgonal network are visible. 



13. Small portion of a taugeutial thin secliou. X 100. The larger white pores are 



lacunae, while the smaller intermediate ones are lumen pores. 

 Jliddle Jacksonian (Castle Ha.vne limestone) : Wilmington, North Carolina. 

 Cat. No. 64033, U.S.N.M. 

 Figs. 14-2t>. iJctr(icoli>usa ailiinlrird. new species (p. .'joTl. 



14. The free, cylindrical zoaria, natural size. 



15. An example, X 20, in v.-hich the keel of the ovicell is little developed. 



16. Surface of zooecia, X 20, with the avicularia reduced in size. 



17. A well-preserved specimen, X 20. with the ovicell and avicularia well developed 



One of the zooecial aiiertures is closed by a calcareous operculum. 

 IS. Another zoarinni, X 20, in which the avicularia are absent. 



19. Sketch of a longitudinal section through a zoarium, X 20. showing the structure of 



the zoot>cia and their thin walls. 



20. The narrow lower extremity of the zoariuni. X 20, exhiliitiug llnve pores. 

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



Cat. No. 64034, F.S.N.M. 



43 



