Plate 7. 



Fics. 1-13. BcixxrliiKt iii'iihniiiitiiirii. new sineies (p. 3l!4). 



1. Two fragiuents of tbe ii.nrnw Iiifoliate zoariniii. ii:itiii-al size. 



2. Surface of an example. X lin, with abiindam frontal pores. 



3. Anotlier specimen, X Lid. with tlie frdiita! pores absent and with several zooecia 



exhiliitini; the ovicell cavities. 



4. A frairineut. X 20, with frontal jiures rarely developed. The ascoiiore is jilainly 



visible. 



5. View of the intericir (if the zooecia, X 2(1. The zooecia and the large tubules are 



visible. 



6. Surface of a fragment, X 20, with a single avicularian zooeciuui. 



7. Transversal section, X 20, showing the thin lateral walls intimately joined. 

 S. Tangential thin section, X 20. 



9. Transversal thin section, X 20, illustrating the two lamellae with dense, crowded 



olocystal elements arranged transver.sally. 

 If. A bifurcated zoariuui. X 2<l. e.xhibiting several .iviculariau zooecia. 



11. Tangential thin section, X 100. cutting the basal olocyst and shdwing the dense 



structure. 



12. Schematic drawing of the longitudinal section. X 20. ap, apertura ; o.sc, ascopore; 



in\ avicularia ; oZ, olocyst; pi, peristome: pk; peristomice; z, zooeciuni. 



13. A zoarium, X 20. with several avicularian zooecia. 



Midwayan (Clayton limestone) : Jlabelvale. near Little Rock, Arkansas. 

 Cat. Xo. 03S21, U.S.X.M. 

 Fig. 14. BeisscUiia labiata Galjb and Horn, 1S02. 



An exam]ile of this siiecies. X 20, introduced for cumparisou. The large .salient 



avicularia are characteristic. 

 Upper Cretaceous (Vincentown ) : Viucentown, New Jersey. 

 Cat. Xo. (53822, I'.S.N.JI. 

 Figs. 15.16. Hippolhoa ? cniijuiictti. new species (p. 327). 



15. The incrustiug zoarium. X 20, having zooecia with long caudal portions. 



16. Another zo.irium, X 20, in which the caudal portions are much shorter. 

 Midwayan (Clayton limestone) : Luverne. Crenshaw County, Alabama. 



Cat. Xo. 63823, U.S.X.M. 

 Figs. 17-10. Uippoporhia iiiitliruiiniiiid. new species (p. o7.jI. 



17. Small colony, X 20, showing absence of dorsal dietellae and olocyst on some zooecia. 



18. A normal example of the incrustiug zoarium. X 20. The shape of the aperture, 



the spines and the avicularian zooecia are well .shown. 



19. A young zoarium, X 20, with several ovicelled zooecia. 



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



Cat. Xo. 63824, U,S.X.M. 

 Fig. 20. Aiidrtliroiinni rerrucosa, new species (p. 430). 



The ty|ie-specinien of tliis incrustiug species, X 20. 



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



Cat. Xo. 6.382.">. U.S.X.M. 



