PLATE XLIII 



PAGE 



Figs. 1-4. LJOCLEMA SUBRAMOSUM n. sp 273 



1. Vertical section, X 20. 



2, 3. Tangential section, X 20, through the mature zone, and a small 



portion of the same, X 50, illustrating the structure of the walls 

 and acanthopores. 



4. A tangential section, X 20, through an early stage of the mature 



zone where the acanthopores are undeveloped and the zoo3cia 

 are thin walled. 

 Helderberg formation, Keyser member, Keyser, W. Va. 



Figs. 5-8. ERIDOTRYPA PARVULIPORA n. sp 272 



5. A tangential section, X 20. 



6. A portion of another tangential section, X 20, in which the acantho- 



pores are more numerous. 



7. Several zocecia of a thin section, X 50. 



8. A vertical section, X 20. 



Helderberg formation, Keyser member, Keyser, W. Va. 



Figs. 9-12. LJOCLEMA PULCHEIXUM, n. sp 274 



9, 10. Tangential section, X 20, and a portion, X 35, passing through 

 the mature zone. 



11. A vertical section, X 20. 



12. Surface of the type, X 9. 



Helderberg formation, Keyser member, Keyser, W. Va. 



Figs. 13-16. FiSTULiPORELLA MINIMA n. sp 265 



13. Side view of a zoarium, natural size. 



14. Tangential section, X 20. 



15. A zooBcium of the same section, X 50. 



16. A vertical section, X 20, through two layers of zocpcia. 



Helderberg formation, Keyser member, Keyser, W. Va. 



