PLATE XXXV. 



Ptilodictya hilli. 



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Fig. 1. Transverse section of a specimen. Page 30 



Fig. 2. View of an unusually large front. 

 Fig. 4. A portion of a frond enlarged. 

 Fig. 5.. View of a small, imperfect frond. 



Brachiospongia digitata. 



Fig. 3. Basal view of an unusually perfect specimen. Page 29 



