Plate 41. 



Figs. 1-3. Macroixtni itiiiltHtiiiirlloxo. new species (\). 2771. 



1. Surface of the e.xtei'iial la.ver of tlie iiuiltilauieUar zo.-iriiuii. X 20. The normal zooecia 



are smooth and separated liy a salient line. Hydrostatic tuherosities are developed 

 on the frontal in the lower half of the fisnre. 



2. Zooecia of an internal lamella, X 2(i. Their fidiital is granulated and their apertures 



are closed liy a lamina. 



3. Sketch of tanL'ential Ihhi section through a zooecium, X 20, showing occurrence of 3 



dietell;ie. 

 Middle .l.-icksonian (Cistle Havne limestone! : Wilmington, North Carolina. 

 Cat. Xo. 6401.J. f.S.X.M. 

 Figs. 4, .">. llciiihraniiiorcUn iilrii-hi. new siiecies (p. 287). 



4. Surf;ice of the hilamellar /.o.irium, X 20. showing all of the specifie characters \yell 



developed. 



5. T.mgential thill seiti(ai through the frontal of a zooecium. X 100. showing regularly 



jilaced olocystal elements. 

 Middle .J;i(/l;sonian : Xear I.enuds Ferrv. Soutli Carolina. 

 Cat. Xo. 0401(5. r.S.X.M. 

 Figs. 6-8. MrnihniHiiiorclIu coiniirctsn, new species (]i. 2S8). 



6. Views of the free cylindrical zoarinm. X 20. 



Middle Jacksouian : 18 miles west of Wrights\ ille. (ieorgia. 

 Cat. Xo. G4017. F.S.X.M. 

 7, S. Two fragments of a more compressed example. X 20. 



Middle Jacksouian : One-h.ilf mile southeast of Georgia Kaolin Company's Mine, 

 Twiggs County, (ieorgia. 

 Cat. Xo. (14018. F.S.X.M. 

 Figs. 9, 10. MeiiilirdiiiiioreUn niniiilifcid. new species (p. 289). 



9. View of the iucrusting zo;irinn\, X 20, showing the costular tuherosities in the form 

 of a T. Several zooecia have broken ovicells. 

 Middle Jacksouian (Castle llayne limestone) : Wilmington, North Carolina. 

 Cat. Xo. C4019, F.S.N.M. 



10. Young zooecia. X 20. The ]irominence at the .-iiiertnre only is developed. 

 Middle Jacksouian: Ne.ar Lemids Ferry. South Carolina. 



Cat. No. (34020. F.S.\..M. 

 F1G.S. 11-13. Mciiihrnniiioiclhi Jiioeiildtn. new species (]i. 287). 



11. The ini-rusting zoarinm. X 20. showing the characteristic two large pores. 



12. Another portion of the same zoarinm. X 20. with an ovicelled zooecium. 



13. Another specimen, X 20, illustrating development of the nnicro to form the two large 



pore.s. The zooecia with avicularium liave no spines. 

 Middle Jacksouian: X'ear Lennds Ferrv. South Carolina. 

 Cat. Xo. 04021, T'.S.X.M. 

 Figs. 14-18. PiicIliiKi nnlintd Moll. 1,s03 (p. 29.5 i. 



14. Portion of the iucrusting zoarinm. X 2.5. No avicularia ai'e visible. 



15. Another zoaiiuni. X 25. in which the long avicularium is developed. Several zooecia 



with keeled ovicell may lie noted. 

 Middle Jacksouian (Castle Ilayne limestone) : Wilmington, North Carolina. 

 Cat. No. 04022. F.S.N.M. 

 16, 17. Two zoaria, X 25. preserving the ancestrula v/hich is a membraniporoid zooecium 

 surrounded b.v siiines. 

 Vicksliurgiau (Marianu;i limestone i : Tliree miles southea.st of Voshurg, Jasper County, 

 Mississippi. 



Cat. No. 64023. F.S.N. .M. 

 IS. Portion of an example. X 25. showing the ancestrula (in the lower part") and an 

 avicularium regenerated in a zooei-imn ( npiier jiart of figure i. 

 Vicksliurgiau ( ■' ('hiiuney rock" of Jlari.-iuua limestone) : One mile north of Monroe- 

 ville, Alahama. 



Cat. No. 64024, I'.S.N.M. 

 Fig. 19. Piiclliiiii rifUiiin luiiiliruUi. new variet.v (p. 297). 



Surface of tlie type, X 25, exhibiting the characteristic avicnlai'ia with beak like that 



of a duck. 

 Fpper Jacksouian (Ocala liuiestone) : Seven miles above Bainbridge Georgia 

 Cat. -Vo. 64025. I'.S.N.M. 

 Fig. 20. Piicllhiii nitlintn idi-uliiinixif: (iabl) and Horn, 1862 (p. 297). 



Surface of zooecia, X 25. illustrating the clmr.-icteristic smooth peristome and large 



avicularia. 

 Middle Jacksouian: Neai- T.euuds Ferrv. South Carolina. 

 Cat. No. (54026, T'.S.N.M. 

 Fig. 21. PikIUiih xiniiildtor. new species. (See also pi. S4. tig. 14.) (p. 298.) 

 Dvicelled zooecia. X 25. 



Jack.souian (Zeuglodon zone) : Cocoa post otiice. Choctaw County Vlabama 

 Cat. Xo. 64027, F.S.X.M. 

 Fig. 22. Pdilliiiii liisiniiosn. n-3W species (p. 297). 



An example, X 25. with tlie zooecia showing the two large spines and two small tri- 

 angular avicularia. 

 T'pper Jacksouian (Ocala limestone") : Seven miles above Bainbridge, (ieorgia. 

 Cat. Xo. 0402S. T'.S.X.M. 

 42 



