I'LATE 102. 



Figs. 1-4. Klci<lio,n_'llu vcmicosd, new sprcics (p. G21). (Sco also plate UVl.) 



1 A transverse thin section, X 20. illustrating same features as in figure 2. 



2 Transverse section of a multilamellar frond, X 10. The two layers of orienteil 



zooecia are visible in the midiUe, while the rest of the zoariuni is composed of one 

 layer upon another of cumulate zooecia. 



3. Tangential section, X 20, showing that the zoooeial walls are formed of dense 



olocystal elements. 



4. Longitudinal section, X 10. The oriented zooecia in the middle and several layers of 



cumulate zooecia piletl up on each side are to be noted. 

 Vicksburgian ("Chimney rock" of Marianna limestone): 1 mile north of Monroe- 

 ville, Alabama. 



Cat. No. 64327, U.S.N.M. 

 Figs. 5. G. HoIoporeUa perutomaria, new species (p. Oil). 

 ' 5 Zoarium, natural size, a small irregular mass. 



G. Surface of the same, X 20, showing the characteristic development of the peristomie. 

 ' Vicksburgian (Byram marl) : Byram, Mississippi. 

 Cat. No. G4328, U.S.N.M. 

 Figs. 7-0. HohiiinrcUa srpofiitd, new species (p. 610). 



7 The free, globular zoarium, natural size. 



8 Surface of zoarium, X 20, showing usual aspect. Incomplete zooecia are abundant 



and the oral avicularia are broken and represented by a cicatrix. 



9 Surface, X 20, of a warium which has stoppetl growth upon completion of the 



superficial zooecia. The spines and the avicularia are preserved. 

 Vicksburgian ((ilendon member of Marianna limestone): West bank of Conecuh 

 River. Escambia County, Alabama. 

 Cat. No. 64.329, U.S.N.M. 

 Figs 10-13. Holoiwrdla discus, new species (p. 612). 



10 Four of the discoidal zoaria, natural size, showing both top and basal surfaces. 



11 Celluliferous surface, X 20, exhibiting incomplete zooecia and areolae. 



12'. Basal surface of zoarium, X 20, showing arrangement of zooecia and the small 



perforating pore. 

 13 Another celluliferous surface. X 20. illustrating shape of the apertura. 



' Vicksburgian ("Chimney rock" of Marianna limestone): 1 mile north of Monroe- 

 ville, Alabama. 



Cat. No. 64330, U.S.N.M. 

 Figs 14-17 Fedora pusilhi. new species (p. 624). 



14. Surface of the small conical zoarium, X 20. Several ovicelled zooecia are present, 



with apertures larger than the unovicelled ones. 

 15 Dorsal side of a zoarium, X 20. 



16. Longitudinal fracture, X 20, exhibiting the hollow interior. 

 17 Top view of the cone-shaped zoarium, X 20. 



Vick.<burgian (Byram marl): One-fourth mile west of Woodward, AV-iyue County, 



Mississippi. 



Cat. No. 64331, U.S.N.M. 



103 



