PLATE XLVII 



PAGE 



Figs. 1, 2. FENESTEIXA CUMBERLANDICA n. sp 280 



1. Obverse face, X 5. 



2. Reverse face, X 5. 



Helderberg formation, Keyser member, Cash Valley. 



Fig. 3. POLYPORA DICTYOTA n. sp 283 



Reverse face of the type specimen, X 5. Helderberg formation, Keyser 

 member, Devil's Backbone. 



Figs. 4-6. THAMNISCUS KEGULARIS n. sp 286 



4, 6. Celluliferous and non-celluliferous face respectively of the two 



type specimens, X 1.5. 

 6. Enlargement of a portion of fig. 4, X 5. 



Helderberg formation, Keyser member, Devil's Backbone. 



