Plate 71 



Figs. 1-S. Adcmicllti foUiriilnld Cmhu and r.MSsli'i-, ll'lT (p. 5021. 

 1 Fragments of the bilamellar zoarium, natural si/.e. 



2. Zoiirial liranch, X 20. illustrating tbe occurrence of a large iiiterzooecial avieulai-ium 



and numerous small round avlcularia. 



3. Axial zooeeia, X 20. These are usually shorter than the marginal ones. 



4 A frond, X 20, couniosed entirel.v of long zooeeia. 



5 V common aspect of the species, X 20. The surface is altered by fossilization. 



6 Portion of a branch, X 20, with gonoecia. The zooeeia with the ascopore close to 



the apertura are ordinary ones while the gonoecia have the ascopore further 



removed. 

 7 Interior of zooeci.-i, X 20. The areolae, spiramen, and apertura are illustrated. 

 S. Longitudinal section, X 20. illustrating internal structure, ap, aperture: ol. oloeyst; 

 pie. peristomice: sp, spiramen: ~. zooeciuni. 

 Middle Jacksonian (Castle Hayne limestone) : Wilmington, North Caroluia. 

 Cat. No. 6260S, U.S.N.M. 

 Fig 9. Phiihictclhi pnrricollum. new species (p. 574K 



The type-specimeu of this incrusting species, X 20. The peristome is little salient 



and has a distal tongue. 

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

 Cat. No. 64192, U.S.N.M. 

 Fig 10 PeririnMreUa hcrnrfonalis. new species (p. 577). 



The incrusting zoarium, X 20, with both ordinary and ovicelled zooeeia. 

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

 Cat. No. 64193, U.S.N.M. 

 Fig 11 PcriiKixtrclhi ilioiiiholdaUs. new species (p. 577). 



Surface of the bilamellar zoarium, X 20. The zooeeia are rhomboidal in shape and 



the ovicell is small and transverse. 

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

 Cat. No. 64104, U.S.N.M. 

 Figs 1''-14 Pnimixtrclla cvcloris Gabb and Horn. 1S62 (p. 577). 



12. Ovicelled and ordinary zooeeia of the incrusting zoarium, X 20. Tlie salient 



Is well developed. 



13. Schematic section of a zooecium published by Gabb and Horn. 

 14 View of the interior, X 20. 



Middle Jaclvsonian (Castle Hayne limestone) ; Wilmington, North Carolina. 

 Cat. No. 64195, U.S.N.M. 

 Figs lo-V^. Pcric/dstrcUa oscitans. new spet-ies (v- 'uS). 



■ 15. A well" preserved example of this Incrusting species, X 20, showing the ancestrula 

 and neighboring zooeeia. 



16. The usual aspect of the surface, X 20. 



17. A zoarium, X 20, with the zooecial frontal smooth. 



18. Interior of zooeeia, X 20. 



Lower Jacksonian (Moodys marl): Jackson, Mississippi. 

 Cat. No. 64196, U.S.N.M. 

 55899— 20— Bull. 106 10 



iiuicro 



